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Arnold Berstad

Professor
  • E-mailArnold.Berstad@uib.no
  • Phone+47 55 97 21 33
  • Visitor Address
    Haukeland universitetssykehus, Laboratoriebygget
  • Postal Address
    Postboks 7804
    5020 Bergen
Books
  • Valeur, Jørgen; Berstad, Arnold. 2009. Inspeksjon av feces. En praktisk tilnærming. ISBN: 978-82-8070-073-5.
Journal articles
  • Bernhoft, Aksel; Berstad, Arnold; Eggesbø, Merete Åse; Garborg, Kjetil Kjeldstad; Harstad, Odd Magne; Holst-Jensen, Arne; Midtvedt, Tore; Paulsen, Jan Erik; Raa, Jan; Rudi, Knut; Trøseid, Marius; Valeur, Jørgen; Vatn, Morten H; Wold, Agnes; Aas, Anne-Marie. 2017. Tarmens viktige mikrober. Del III: Kan avføring brukes som behandling mot sykdommer? Forskning.no : nettavis med nyheter fra norsk og internasjonal forskning. Published 2017-02-20.
  • Bernhoft, Aksel; Berstad, Arnold; Eggesbø, Merete Åse; Garborg, Kjetil Kjeldstad; Harstad, Odd Magne; Holst-Jensen, Arne; Midtvedt, Tore; Paulsen, Jan Erik; Raa, Jan; Rudi, Knut; Trøseid, Marius; Valeur, Jørgen; Vatn, Morten H; Wold, Agnes; Aas, Anne-Marie. 2017. Tarmens viktige mikrober. Del II: Disse sykdommene kan kobles til det som bor i tarmen. Forskning.no : nettavis med nyheter fra norsk og internasjonal forskning. Published 2017-02-19.
  • Bernhoft, Aksel; Berstad, Arnold; Eggesbø, Merete Åse; Garborg, Kjetil Kjeldstad; Harstad, Odd Magne; Holst-Jensen, Arne; Midtvedt, Tore; Paulsen, Jan Erik; Raa, Jan; Rudi, Knut; Trøseid, Marius; Valeur, Jørgen; Vatn, Morten H; Wold, Agnes; Aas, Anne-Marie. 2017. Tarmens viktige mikrober. Del I: Tarmens viktige mikrober har stor betydning for helsen. Forskning.no : nettavis med nyheter fra norsk og internasjonal forskning. Published 2017-02-18.
  • Berstad, Arnold; Raa, Jan; Valeur, Jørgen. 2017. Functional food for functional disorders. Microbial Ecology in Health and Disease. 28.
  • Landfald, Bjarne; Valeur, Jørgen; Berstad, Arnold; Raa, Jan. 2017. Microbial trimethylamine-N-oxide as a disease marker: something fishy? Microbial Ecology in Health and Disease. 28. doi: 10.1080/16512235.2017.1327309
  • Valeur, Jørgen; Berstad, Arnold. 2017. Is i magen. NGF-nytt. 24: 27-27.
  • Berstad, Arnold; Raa, Jan; Midtvedt, Tore; Valeur, Jørgen. 2016. Melkesyrebakterier - gjøkunger i tarmen? NGF-nytt. 23: 51-54.
  • Berstad, Arnold; Raa, Jan; Midtvedt, Tore; Valeur, Jørgen. 2016. Probiotic lactic acid bacteria - the fledgling cuckoos of the gut? Microbial Ecology in Health and Disease. 27. doi: http://dx.doi.org/10.3402/mehd.v27.31557
  • Berstad, Arnold; Raa, Jan; Valeur, Jørgen. 2016. Lett fordøyelig mat gir "hedonisk" sult og bidrar til overvekt. Helsemagasinet VOF. 7: 64-68.
  • Berstad, Arnold; Valeur, Jørgen. 2016. Gut gateway to generalized pain. Scandinavian Journal of Pain. 13: 164-165. doi: http://dx.doi.org/10.1016/j.sjpain.2016.06.001
  • Brackmann, Stephan; Valeur, Jørgen; Raa, Jan; Berstad, Arnold. 2016. Sauerkraut - mat, medisin og konserveringsmiddel i over 2000 år. NGF-nytt. 23: 46-47.
  • Undseth, Ragnhild Marie; Berstad, Arnold; Valeur, Jørgen. 2016. Systemic symptoms in irritable bowel syndrome: An investigative study on the role of enterocyte disintegrity, endotoxemia and inflammation. Molecular Medicine Reports. 14: 5072-5076. doi: 10.3892/mmr.2016.5878
  • Valeur, Jørgen; Erchinger, Friedemann Georg; Berstad, Arnold. 2016. Diagnostikk av gjæringsdyspepsi - før og nå. NGF-nytt. 23: 36-37.
  • Valeur, Jørgen; Landfald, Bjarne; Berstad, Arnold; Raa, Jan. 2016. Trimethylamine N-oxide in seafood. Rotten or forgotten? Journal of the American College of Cardiology. 68: 2916-2917.
  • Valeur, Jørgen; Røseth, Arne; Knudsen, Torunn; Malmstrøm, Gunn Helen; Fiennes, Jennifer Twisleton; Midtvedt, Tore; Berstad, Arnold. 2016. Fecal Fermentation in Irritable Bowel Syndrome: Influence of Dietary Restriction of Fermentable Oligosaccharides, Disaccharides, Monosaccharides and Polyols. Digestion. 94: 50-56. doi: 10.1159/000448280
  • Valeur, Jørgen; Røseth, Arne; Knudsen, Torunn; Malmstrøm, Gunn Helen; Fiennes, Jennifer Twisleton; Midtvedt, Tore; Berstad, Arnold. 2016. Dietary FODMAP restriction alters faecal fermentation in patients with IBS. Neurogastroenterology and Motility. 28: 25-25.
  • Valeur, Jørgen; Undseth, Ragnhild Marie; Berstad, Arnold. 2016. "Gährungsdyspepsie" revisited. American Journal of Gastroenterology. 111: 145-147. doi: 10.1038/ajg.2015.361
  • Berstad, Arnold. 2015. Professor Johannes Myren. Scandinavian Journal of Gastroenterology. 50: 628-629. doi: 10.3109/00365521.2015.1018314
  • Berstad, Arnold; Raa, Jan; Valeur, Jørgen. 2015. Hedonisk hunger, fedme og bearbeidet mat. NGF-nytt. 22: 64-66.
  • Berstad, Arnold; Raa, Jan; Valeur, Jørgen. 2015. Indole - the scent of a healthy "inner soil". Microbial Ecology in Health and Disease. 26.
  • Berstad, Arnold; Valeur, Jørgen; Raa, Jan; Midtvedt, Tore. 2015. Beskyttende bakterier. Nationen. Published 2015-01-10.
  • Raa, Jan; Berstad, Arnold; Valeur, Jørgen. 2015. Forstyrrelser i tarmkanalens redoks-biologi - en oversett sykdomsmekanisme? NGF-nytt. 22: 32-36.
  • Sauar, Jostein; Valeur, Jørgen; Berstad, Arnold; Lundin, Knut E A; Engstrand, Lars; Farup, Per Grønaas. 2015. Det første nasjonale møtet om funksjonelle mage-tarm-lidelser (FGID) 18. mars 2015. NGF-nytt. 22: 32-33.
  • Undseth, Ragnhild Marie; Jakobsdottir, Greta; Nyman, Margareta; Berstad, Arnold; Valeur, Jørgen. 2015. Low serum levels of short-chain fatty acids after lactulose ingestion may indicate impaired colonic fermentation in patients with irritable bowel syndrome. Clinical and Experimental Gastroenterology. 8: 303-308. doi: 10.2147/CEG.S94084
  • Undseth, Ragnhild Marie; Trøseid, Marius; Berstad, Arnold; Valeur, Jørgen. 2015. Markers of intestinal injury and endotoxemia in patients with irritable bowel syndrome. Neurogastroenterology and Motility. 27: 105-105. doi: 10.1111/nmo.12598
  • Valeur, Jørgen; Berstad, Arnold; Hausken, Trygve. 2015. The effect of body position on postprandial perceptions, gastric emptying, and intragastric meal distribution: An ultrasonographic study in reclining healthy subjects. Scandinavian Journal of Gastroenterology. 50: 170-173. doi: 10.3109/00365521.2014.990506
  • Valeur, Jørgen; Puaschitz, Nathalie Genevieve; Midtvedt, Tore; Berstad, Arnold. 2015. Oatmeal porridge: Impact on microflora-associated characteristics in healthy subjects. British Journal of Nutrition. 115: 62-67. doi: 10.1017/S0007114515004213
  • Berstad, Arnold; Hauso, Olav; Valeur, Jørgen. 2014. Intestinal staphylococcal small colony variants: a cause of medically unexplained physical symptoms? Microbial Ecology in Health and Disease. 25.
  • Berstad, Arnold; Raa, Jan; Valeur, Jørgen. 2014. Tryptofan: "essensiell" også i IBS-patogenesen? NGF-nytt. 21: 12-14.
  • Berstad, Arnold; Raa, Jan; Valeur, Jørgen. 2014. Tryptophan: ‘essential’ for the pathogenesis of irritable bowel syndrome? Scandinavian Journal of Gastroenterology. 49: 1493-1498. doi: 10.3109/00365521.2014.936034
  • Berstad, Arnold; Raa, Jan; Valeur, Jørgen. 2014. Indol - duften av et sunt indre jordsmonn. NGF-nytt. 21: 36-37.
  • Berstad, Arnold; Valeur, Jørgen. 2014. Skal FODMAP-dietten tilpasses den enkelte pasient? Fordøyelsen. 2. 28-30.
  • Berstad, Arnold; Valeur, Jørgen. 2014. Skal FODMAP-dietten tilpasses den enkelte pasient? NGF-nytt. 21: 20-21.
  • Berstad, Arnold; Valeur, Jørgen. 2014. Komorbiditet ved opplevd matintoleranse. BestPractice Gastroenterologi. 6. 7-9.
  • Berstad, Arnold; Valeur, Jørgen; Sauar, Jostein. 2014. Pasienter med irritabel tarm: Meld dere inn i Landsforeningen mot fordøyelsessykdommer! Fordøyelsen. 2. 26-26.
  • Undseth, Ragnhild Marie; Berstad, Arnold; Klow, Nils-Einar; Arnljot, Kristine; Moi, Kristin Skjeggestad; Valeur, Jørgen. 2014. Abnormal accumulation of intestinal fluid following ingestion of an unabsorbable carbohydrate in patients with irritable bowel syndrome: an MRI study. Neurogastroenterology and Motility. 26: 1686-1693. doi: 10.1111/nmo.12449
  • Undseth, Ragnhild Marie; Jakobsdottir, Greta; Nyman, Margareta; Berstad, Arnold; Valeur, Jørgen. 2014. Low serum levels of short-chain fatty acids after lactulose ingestion may indicate impaired microbial fermentation in patients with irritable bowel syndrome. United European Gastroenterology journal. 2: A556-A556.
  • Berstad, Arnold; Valeur, Jørgen. 2013. "Lekk tarm": Fleip eller fakta? NGF-nytt. 20: 32-34.
  • Berstad, Arnold; Valeur, Jørgen. 2013. "Lekk tarm": En årsak til fibromyalgi? Fibromyalgibladet. 2. 9-10.
  • Berstad, Arnold; Valeur, Jørgen. 2013. Immunologi ved uforklart, selvrapportert matoverfølsomhet. Indremedisineren. 4. 40-41.
  • Berstad, Arnold; Valeur, Jørgen. 2013. Guanylat syklase C-stimulering - endelig noe som hjelper mot irritabel tarm? NGF-nytt. 20: 33-33.
  • Lind, Ragna Anne; Berstad, Arnold; Hatlebakk, Jan G; Valeur, Jørgen. 2013. Chronic fatigue in patients with unexplained self-reported food hypersensitivity and irritable bowel syndrome: validation of a Norwegian translation of the Fatigue Impact Scale. Clinical and Experimental Gastroenterology. 6: 101-107. doi: 10.2147/CEG.S45760
  • Lærum, Ole Didrik; Berstad, Arnold; Valeur, Jørgen. 2013. Lytt til barna // Dessertmage. Tidsskrift for Den norske legeforening. 133: 12536-12537.
  • Undseth, Ragnhild Marie; Berstad, Arnold; Valeur, Jørgen. 2013. FODMAP-intolerance in IBS: Visualization by Magnetic Resonance Imaging. United European Gastroenterology journal. 1: A110-A110.
  • Valeur, Jørgen; Berstad, Arnold. 2013. Irritabel tarm-syndrom - et mikrobielt perspektiv. Tidsskrift for Den norske legeforening. 133: 2276-2278. doi: 10.4045/tidsskr.13.1185
  • Våge, Villy; Nilsen, Roy Miodini; Berstad, Arnold; Behme, Jan Horst; Sletteskog, Nils; Gåsdal, Stein Ronny; Laukeland, Camilla; Mellgren, Gunnar. 2013. Predictors for remission of major components of the metabolic syndrome after biliopancreatic diversion with duodenal switch (BPDDS). Obesity Surgery. 23: 80-86. doi: 10.1007/s11695-012-0775-0
  • Berstad, Arnold; Morken, Mette Helvik; Lied, Gülen Arsland; Lind, Ragna; Hjartholm, Aud-Sissel; Valeur, Jørgen. 2012. Fecal fat excretion in irritable bowel syndrome. Scandinavian Journal of Gastroenterology. 47: 1120-1121. doi: 10.3109/00365521.2012.696683
  • Berstad, Arnold; Undseth, Ragnhild M; Lind, Ragna; Valeur, Jørgen. 2012. Comorbidity in patients with perceived food hypersensitivity. Gut. 61: A337.
  • Berstad, Arnold; Undseth, Ragnhild M; Lind, Ragna; Valeur, Jørgen. 2012. Functional bowel symptoms, fibromyalgia and fatigue: A food-induced triad? Scandinavian Journal of Gastroenterology. 47: 914-919. doi: 10.3109/00365521.2012.690045
  • Berstad, Arnold; Valeur, Jørgen. 2012. Det er ikke allergi alt som romler! Men hva er det da? Helserådet. 20: 17-18.
  • Berstad, Arnold; Valeur, Jørgen. 2012. "MikrObesitas" - og dens mulige behandling med havregrynsgrøt og kanel. NGF-nytt. 19: 10-12.
  • Vaali, Kirsi Kaarina; Lappalainen, Jani; Lin, Aung Htun; Mäyränpää, Mikko I.; Kovanen, Petri T.; Berstad, Arnold; Eklund, Kari K. 2012. Imatinib mesylate alleviates diarrhea in a mouse model of intestinal allergy. Neurogastroenterology and Motility. 24: e325-e335. doi: 10.1111/j.1365-2982.2012.01941.x
  • Valeur, Jørgen; Berstad, Arnold. 2012. Laktuloseprovokasjon: Nyttig undersøkelse ved irritabel tarm-syndrom? NGF-nytt. 19: 13-14.
  • Berstad, Arnold; Valeur, Jørgen. 2011. Dessertmage. Tidsskrift for Den norske legeforening. 131: 2453-2453.
  • Berstad, Arnold; Valeur, Jørgen. 2011. Mageplager ved fibromyalgi: Et tarmfloraproblem? Fibromyalgibladet. 3. 6-11.
  • Berstad, Arnold; Valeur, Jørgen; Lillestøl, Kristine; Lind, Ragna; Morken, Mette Helvik; Gregersen, Kine; Lied, Gülen Arsland; Tangen, Tone; Florvaag, Erik. 2011. Pasienten tåler ikke mat - hva skal vi tro? Utposten. 40: 36-40.
  • Gregersen, Kine; Valeur, Jørgen; Lillestøl, Kristine; Frøyland, Livar; Araujo, Hernandez Pedro W.; Lied, Gülen Arsland; Berstad, Arnold. 2011. Subjective food hypersensitivity: assessment of enterochromaffin cell markers in blood and gut lavage fluid. International Journal of General Medicine. 4: 555-560. doi: 10.2147/IJGM.S18349
  • Lied, Gülen Arsland; Berstad, Arnold. 2011. Functional and clinical aspects of the B-cell-activating factor (BAFF): a narrative review. Scandinavian Journal of Immunology. 73: 1-7. doi: 10.1111/j.1365-3083.2010.02470.x
  • Lied, Gülen Arsland; Lillestøl, Kristine; Lind, Ragna; Valeur, Jørgen; Morken, Mette Helvik; Vaali, Kirsi Kaarina; Gregersen, Kine; Florvaag, Erik; Tangen, Tone; Berstad, Arnold. 2011. Perceived food hypersensitivity: A review of 10 years of interdisciplinary research at a reference center. Scandinavian Journal of Gastroenterology. 46: 1169-1178. doi: 10.3109/00365521.2011.591428
  • Lied, Gülen Arsland; Vogelsang, Petra; Berstad, Arnold; Appel, Silke. 2011. Dendritic cell populations in patients with self-reported food hypersensitivity. International Journal of General Medicine. 4: 389-396. doi: 10.2147/IJGM.S17655
  • Valeur, Jørgen; Berstad, Arnold; Midtvedt, Tore. 2011. Intestinal autointoksikasjon - fortsatt aktuell sykdomsmekanisme? Tidsskrift for Den norske legeforening. 131: 1875-1876.
  • Våge, Villy; Gåsdal, Stein Ronny; Laukeland, Camilla; Sletteskog, Nils; Behme, Jan Horst; Berstad, Arnold; Andersen, John Roger. 2011. The Biliopancreatic Diversion with a Duodenal Switch (BPDDS): How Is It Optimally Performed? Obesity Surgery. 21: 1864-1869. doi: 10.1007/s11695-011-0496-9
  • Berstad, Arnold; Erchinger, Friedemann; Hjartholm, Aud-Sissel. 2010. Fecal fat determination with a modified titration method. Scandinavian Journal of Gastroenterology. 45: 603-607. doi: 10.3109/00365521003611299
  • Gregersen, Kine; Lind, Ragna; Valeur, Jørgen; Bjørkkjær, Tormod; Berstad, Arnold; Lied, Gülen Arsland. 2010. Duodenal administered seal oil for patients with subjective food hypersensitivity: an explorative open pilot study. International Journal of General Medicine. 3: 383-392. doi: 10.2147/IJGM.S13013
  • Hystad, Hilde Tang; Valeur, Jørgen; Berstad, Arnold. 2010. Bør personer med irritabel tarm spise mindre tungt fordøyelige karbohydrater? Norsk tidsskrift for ernæring. 1. 12-17.
  • Lied, Gülen Arsland; Lillestøl, Kristine; Valeur, Jørgen; Berstad, Arnold. 2010. Intestinal B cell-activating factor: an indicator of non-IgE mediated hypersensitivity reactions to food? Alimentary Pharmacology and Therapeutics. 32: 66-73. doi: 10.1111/j.1365-2036.2010.04314.x
  • Lied, Gülen Arsland; Vogelsang, Petra; Berstad, Arnold; Appel, Silke. 2010. Dendritic cell populations in patients with self-reported food hypersensitivity. Gut. 59: A394.
  • Lillestøl, Kristine; Berstad, Arnold; Lind, Ragna; Florvaag, Erik; Lied, Gülen Arsland; Tangen, Tone. 2010. Anxiety and depression in patients with self-reported food hypersensitivity. General Hospital Psychiatry. 32: 42-48. doi: 10.1016/j.genhosppsych.2009.08.006
  • Lillestøl, Kristine; Helgeland, Lars Inge; Lied, Gülen Arsland; Florvaag, Erik; Valeur, Jørgen; Lind, Ragna; Berstad, Arnold. 2010. Indications of 'atopic bowel' in patients with self-reported food hypersensitivity. Alimentary Pharmacology and Therapeutics. 31: 1112-1122. doi: 10.1111/j.1365-2036.2010.04261.x
  • Lind, Ragna; Lied, Gülen Arsland; Lillestøl, Kristine; Valeur, Jørgen; Berstad, Arnold. 2010. Do psychological factors predict symptom severity in patients with subjective food hypersensitivity? Scandinavian Journal of Gastroenterology. 45: 835-843. doi: 10.3109/00365521003797213
  • Lind, Ragna; Lillestøl, Kristine; Valeur, Jørgen; Eriksen, Hege Randi; Tangen, Tone; Berstad, Arnold; Lied, Gülen Arsland. 2010. Job stress and coping strategies in patients with subjective food hypersensitivity. Scandinavian Journal of Psychology. 59: 179-184. doi: 10.1111/j.1467-9450.2009.00761.x
  • Rønnevik, Alexander K.; Valeur, Jørgen; Berstad, Arnold. 2010. Kan tarmbakteriene gjøre oss fete? Norsk tidsskrift for ernæring. 8: 12-14-16-17.
  • Valeur, Jørgen; Berstad, Arnold. 2010. The colon is a digestive organ! Advances in Physiology Education. 34: 162-162. doi: 10.1152/advan.00063.2010
  • Valeur, Jørgen; Berstad, Arnold. 2010. Colonic fermentation: a neglected topic in human physiology education. Advances in Physiology Education. 34: 22-22. doi: 10.1152/advan.00103.2009
  • Valeur, Jørgen; Berstad, Arnold. 2010. "Samlivsproblemer" i tarmen - en oversett sykdomsmekanisme? Fordøyelsen. 4. 21-22.
  • Valeur, Jørgen; Morken, Mette Helvik; Norin, E; Midtvedt, T; Berstad, Arnold. 2010. Intestinal fermentation in patients with self-reported food hypersensitivity: painful, but protective? Clinical and Experimental Gastroenterology. 3: 65-70.
  • Valeur, Jørgen; Morken, Mette Helvik; Norin, Elisabeth; Midtvedt, Tore; Berstad, Arnold. 2010. Unexplained, self-reported food hypersensitivity: A fermentation problem? Neurogastroenterology and Motility. 22: 79-80.
  • Valeur, Jørgen; Norin, Elisabeth; Midtvedt, Tore; Berstad, Arnold. 2010. Assessment of microbial fermentation products in fecal samples. Neurogastroenterology and Motility. 22: 1147-1147. doi: 10.1111/j.1365-2982.2010.01534.x
  • Bjørkkjær, Tormod; ARAUJO, HERNANDEZ PEDRO W; Madland, Tor Magne; Berstad, Arnold; Frøyland, Livar. 2009. A randomized double blind comparison of short-term duodenally administrated whale and seal blubber oils in patients with inflammatory bowel disease and joint pain. Prostaglandins, Leukotrienes and Essential Fatty Acids. 81: 425-432. doi: 10.1016/j.plefa.2009.07.005
  • Landsvik, Hanne Sylte; Valeur, Jørgen; Berstad, Arnold. 2009. Helseeffekter av probiotika - en kritisk vurdering. Norsk tidsskrift for ernæring. 7: 22-26.
  • Lied, Gülen Arsland; Lillestøl, Kristine; Valeur, Jørgen; Berstad, Arnold. 2009. Potential role of B-cell activating factor in non-IgE-mediated hypersensitivity reactions to food. Gut. 58: A116-A116.
  • Lillestøl, Kristine; Helgeland, Lars Inge; Florvaag, Erik; Lied, Gülen Arsland; Lind, Ragna; Valeur, Jørgen; Berstad, Arnold. 2009. Indications of "atopic bowel" in patients with irritable bowel syndrome. Gut. 58: A20-A20.
  • Lillestøl, Kristine; Valeur, Jørgen; Helgeland, Lars Inge; Florvaag, Erik; Lied, Gülen Arsland; Lind, Ragna; Berstad, Arnold. 2009. Indications of `atopic bowel` in patients with irritable bowel syndrome (IBS). Neurogastroenterology and Motility. 21: 7-7.
  • Morken, Mette Helvik; Lind, Ragna; Valeur, Jørgen; Wilhelmsen, Ingvard; Berstad, Arnold. 2009. Subjective health complaints and quality of life in patients with irritable bowel syndrome following Giardia lamblia infection: A case control study. Scandinavian Journal of Gastroenterology. 44: 308-313. doi: 10.1080/00365520802588091
  • Morken, Mette Helvik; Valeur, Jørgen; Norin, Elisabeth; Midtvedt, Tore; Nysæter, Gunnar; Berstad, Arnold. 2009. Antibiotic or bacterial therapy in post-giardiasis irritable bowel syndrome. Scandinavian Journal of Gastroenterology. 44: 1296-1303. doi: 10.3109/00365520903274401
  • Tack, Johannes; Masclee, Ad A.M.; Heading, Robert C.; Berstad, Arnold; Piessevaux, Hubert; Popiela, Tadeusz; Vandenberghe, Annelies; Kato, Hiroki. 2009. A dose-ranging, placebo-controlled, pilot trial of Acotiamide in patients with functional dyspepsia. Neurogastroenterology and Motility. 21: 272-280. doi: 10.1111/j.1365-2982.2009.01261.x
  • Valeur, Jørgen; Berstad, Arnold. 2009. Tykktarmens bakterieflora - "den siste villmark". Gastroskopet. 22: 7-9.
  • Valeur, Jørgen; Berstad, Arnold. 2009. "Fem om dagen" - tøft for magen? Tidsskrift for Den norske legeforening. 129: 2388-2389. doi: 10.4045/tidsskr.09.1246
  • Valeur, Jørgen; Lappalainen, Jani; Rita, Hannu; Lin, Aung Htun; Kovanen, Petri T.; Berstad, Arnold; Eklund, Kari K.; Vaali, Kirsi Kaarina. 2009. Food allergy alters jejunal circular muscle contractility and induces local inflammatory cytokine expression in a mouse model. BMC Gastroenterology. 9. doi: 10.1186/1471-230X-9-33
  • Valeur, Jørgen; Lillestøl, Kristine; Morken, Mette Helvik; Norin, E; Midtvedt, T; Berstad, Arnold. 2009. Symptoms and rectal fermentation products in response to lactulose challenge in patients with irritable bowel syndrome. Neurogastroenterology and Motility. 21: 83-83.
  • Valeur, Jørgen; Morken, Mette Helvik; Nordin, Ellinor; Midtvedt, Tore; Berstad, Arnold. 2009. Irritable bowel syndrome - an enterometabolic disorder? Scandinavian Journal of Gastroenterology. 44: 28-28.
  • Valeur, Jørgen; Morken, Mette Helvik; Norin, Elisabeth; Midtvedt, Tore; Berstad, Arnold. 2009. Carbohydrate intolerance in patients with self-reported food hypersensitivity: Comparison of lactulose and glucose. Scandinavian Journal of Gastroenterology. 44: 1416-1423.
  • Yazdankhah, Siamak; Midtvedt, Tore; Narvhus, Judith; Berstad, Arnold; Lassen, Jørgen; Halvorsen, Ragnhild. 2009. The use of probiotics for critically ill patients in hospitals. Microbial Ecology in Health and Disease. 21: 114-121.
  • Berstad, Arnold; Grønsdal, Eli Gunvor. 2008. Avføring til besvær. Helsenytt for alle.
  • Berstad, Arnold; Nysæter, Gunnar. 2008. Enteral instillasjon av normal fecalflora ved Clostridium difficile colitt. NGF-nytt. 15: 24-25.
  • Brunborg, Linn Anne Bjelland; Madland, Tor Magne; Lind, Ragna; Arslan, Gülen; Berstad, Arnold; Frøyland, Livar. 2008. Effects of short-term oral administration of dietary marine oils in patients with inflammatory bowel diease: a pilot study comapring weal oil and cod liver oil. Clinical Nutrition. 27: 614-622. doi: 10.1016/j.clnu.2008.01.017
  • Gregersen, Kine; Frøyland, Livar; Berstad, Arnold; Araujo, Pedro. 2008. Direct determination of serotonin in gut lavage fluid by liquid chromatographic ion trap tandem mass spectrometry. Talanta: The International Journal of Pure and Applied Analytical Chemistry. 75: 466-472. doi: 10.1016/j.talanta.2007.11.043
  • Gregersen, Kine; Lind, Ragna; Bjørkkjær, Tormod; Frøyland, Livar; Berstad, Arnold; Lied, Gülen Arsland. 2008. Effects of seal oil on meal-induced symptoms and gastric accommodation in patients with subjective food hypersensitivity. A pilot study. Clinical Medicine : Gastroenterology. 1: 33-41.
  • Jarlsby, Ragnhild; Valeur, Jørgen; Berstad, Arnold. 2008. Laktosemalabsorbsjon - en fordel? Norsk tidsskrift for ernæring. 4. 10-13.
  • Lind, Ragna; Olafsson, Snorri; Hjelland, Ina; Berstad, Arnold; Lied, Gülen Arsland. 2008. Lifestyle of patients with self-reported food hypersensitivity differ little from controls. Gastroenterology Nursing. 31: 401-410.
  • Lunding, Johan Axel; Nordström, Lars Michael; Haukelid, Alf-Olav; Gilja, Odd Helge; Berstad, Arnold; Hausken, Trygve. 2008. Vagal activation by sham feeding improves gastric motility in functional dyspepsia. Neurogastroenterology and Motility. 20: 618-624. doi: 10.1111/j.1365-2982.2007.01076.x
  • Morken, Mette Helvik; Nysæter, Gunnar; Strand,, Elisabeth A.; Hausken, Trygve; Berstad, Arnold. 2008. Lactulose breath test results in patients with persistent abdominal symptoms following Giardia lamblia infection. Scandinavian Journal of Gastroenterology. 43: 141-145. doi: 10.1080/00365520701673960
  • Nysæter, Gunnar; Berstad, Arnold. 2008. Live typhoid vaccine for IBD patients - well tolerated with possible therapeutic effect. Drug Target Insights. 3: 109-113.
  • Valeur, Jørgen; Berstad, Arnold. 2008. Hvorfor har vi tykktarm? Tidsskrift for Den norske legeforening. 128: 1298-1300.
  • Valeur, Jørgen; Lappalainen, Jani; Lin, Aung Htun; Kovanen, Petri; Berstad, Arnold; Eklund, Kari; Vaali, Kirsi Kaarina. 2008. Jejunal dysmotility in food allergy mouse model. Scandinavian Journal of Gastroenterology. 43: 32-32.
  • Valeur, Jørgen; Lappalainen, Jani; Rita, Hannu; Lin, Aung Htun; Kovanen, Petri T.; Berstad, Arnold; Eklund, Kari K.; Vaali, Kirsi Kaarina. 2008. Jejunal dysmotility in a food allergy mouse model. Neurogastroenterology and Motility. 20: 45-45. doi: 10.1111/j.1365-2982.2008.01190.x
  • Valeur, Jørgen; Milde, Anne Marita; Helle, Karen Blaauw; Berstad, Arnold. 2008. Low serum chromogranin A in patients with self-reported food hypersensitivity. Scandinavian Journal of Gastroenterology. 43: 1403-1404. doi: 10.1080/00365520802273074
  • Valeur, Jørgen; Øines, Eliann; Morken, Mette Helvik; Holst, Jens Juul; Berstad, Arnold. 2008. Plasma glucagon-like peptide 1 and peptide YY levels are not altered in symptomatic fructose-sorbitol malabsorption. Scandinavian Journal of Gastroenterology. 43: 1212-1218. doi: 10.1080/00365520802116448
  • Valeur, Jørgen; Øines, Eliann; Morken, Mette Helvik; Lillestøl, Kristine; Lind, Ragna; Vaali, Kirsi Kaarina; Milde, Anne Marita; Holst, Jens Juul; Helle, Karen Blaauw; Berstad, Arnold. 2008. Neuroendocrine biomarkers of symptomatic carbohydrate malabsorption. Neurogastroenterology and Motility. 20: 138-138. doi: 10.1111/j.1365-2982.2008.01190.x
  • Vesterhus, Mette; Ræder, Helge; Aurlien, Harald; Gjesdal, Clara Gram; Bredrup, Cecilie; Holm, Pål Ivar; Molven, Anders; Bindoff, Laurence; Berstad, Arnold; Njølstad, Pål Rasmus. 2008. Neurological features and enzyme therapy in patients with endocrine and exocrine pancreas dysfunction due to CEL mutations. Diabetes Care. 31: 1738-1740. doi: 10.2337/dc07-2217
  • ARAUJO, HERNANDEZ PEDRO W; Bjørkkjær, Tormod; Berstad, Arnold; Frøyland, Livar. 2007. Improved quantification of prostaglandins in biological samples by optimizing simultaneously the relationship eicosanoid/internal standard and using liquid chromatography tandem mass spectrometry. Prostaglandins, Leukotrienes and Essential Fatty Acids. 77: 9-13. doi: 10.1016/j.plefa.2007.04.007
  • Arslan, Gülen; Erichsen, Kari; Milde, Anne Marita; Helgeland, Lars Inge; Bjørkkjær, Tormod; Frøyland, Livar; Berstad, Arnold. 2007. No Protection against DSS-induced Colitis by Short-term Pretreatment with Seal or Fish Oils in Rats. Integrative Medicine Insights. 2: 25-34.
  • Gilja, Odd Helge; Hatlebakk, Jan Gunnar; Ødegaard, Svein; Berstad, Arnold; Viola, Ivan; Giertsen, Christopher; Hausken, Trygve; Gregersen, Hans. 2007. Advanced imaging and visualization in gastrointestinal disorders. World Journal of Gastroenterology. 13: 1408-1421.
  • Gilja, Odd Helge; Tefera, Solomon; Berstad, Arnold; Olafsdottir, Edda Jonina. 2007. Impaired gastric accommodation in children. Neurogastroenterology and Motility. 19: 778-778. doi: 10.1111/j.1365-2982.2007.00954.x
  • Hjelland, Ina Elen; Svebak, Sven; Berstad, Arnold; Flatabø, Geir; Hausken, Trygve. 2007. Breathing exercises with vagal biofeedback may benefit patients with functional dyspepsia. Scandinavian Journal of Gastroenterology. 42: 1054-1062. doi: 10.1080/00365520701259208
  • Lunding, Johan Axel; Gilja, Odd Helge; Hausken, Trygve; Bayati, Alfred; Mattsson, Hillevi; Berstad, Arnold. 2007. Distension-induced gastric accommodation in functional dyspepsia: effect of autonomic manipulation. Neurogastroenterology and Motility. 19: 365-375. doi: 10.1111/j.1365-2982.2006.00896.x
  • Arslan, Gülen; Lillestøl, Kristine; Mulahasanovic, Arna; Florvaag, Erik; Berstad, Arnold. 2006. Food Hypersensitivity Reactions Visualised by Ultrasonography and Magnetic Resonance Imaging in a Patient Lacking Systemic Food-Specific IgE. Digestion. 73: 111-115. doi: 10.1159/000094042
  • Bjørkkjær, Tormod; Brun, Johan G; Valen, Merete; Arslan, Gülen; Lind, Ragna Anne; Brunborg, Linn Anne Bjelland; Berstad, Arnold; Frøyland, Livar. 2006. Short-term duodenal seal oil administration normalised n-6 to n-3 fatty acid ratio in rectal mucosa and ameliorated bodily pain in patients with inflammatory bowel disease. Lipids in Health and Disease. 5. doi: 10.1186/1476-511X-5-6
  • Bjørkkjær, Tormod; Brun, Johan G; Valen, Merete; Arslan, Gülen; Lind, Ragna; Brunborg, Linn Anne Bjelland; Berstad, Arnold; Frøyland, Livar. 2006. Lipids in health and disease. Lipids in Health and Disease. 5. doi: 10.1186/1476-511X-5-6
  • Madland, Tor Magne; Bjørkkjær, Tormod; Brunborg, Linn Anne Bjelland; Frøyland, Livar; Berstad, Arnold; Brun, Johan G. 2006. Subjective improvement in patients with psoriatic arthritis after short-term oral treatment with seal oil. A pilot study with double blind comparison to soy oil. Journal of Rheumatology. 33: 307-310.
  • Arslan, Gülen; Gilja, Odd Helge; Lind, Ragna Anne; Florvaag, Erik; Berstad, Arnold. 2005. Response to intestinal provocation monitored by transabdominal ultrasound in patients with food hypersensitivity. Scandinavian Journal of Gastroenterology. 40: 386-394. doi: 10.1080/00365520510012163
  • Arslan, Gülen; Lind, Ragna Anne; Florvaag, Erik; Berstad, Arnold. 2005. Gastrointestinal matoverfølsomhet hos voksne - nye studier om mulige årsaker. Fagbladet Allergi i praksis. 2: 12-17.
  • Berstad, Arnold; Arslan, Gülen; Lind, Ragna Anne; Florvaag, Erik. 2005. Food hypersensitivity-immunologic (peripheral) or cognitive (central) sensitisation? Psychoneuroendocrinology. 30: 983-989.
  • Berstad, Arnold; Grønsdal, Eli Gunvor. 2005. Kvalme. Helsenytt for alle. 6: 14-15.
  • Berstad, Arnold; Vinsrygg, G. 2005. Matoverfølsomhet og irritabel tykktarm. Helsenytt for alle. 6: 16-17.
  • Erichsen, Kari; Milde, Anne Marita; Arslan, Gülen; Helgeland, Lars; Gudbrandsen, Oddrun Anita; Ulvik, Rune Johan; Berge, Rolf Kristian; Hausken, Trygve; Berstad, Arnold. 2005. Low-dose oral ferrous fumarate aggravated intestinal inflammation in rats with DSS-induced colitis. Inflammatory Bowel Diseases. 11: 744-748.
  • Erichsen, Kari; Ulvik, Rune Johan; Grimstad, Tore; Berstad, Arnold; Berge, Rolf Kristian; Hausken, Trygve. 2005. Effects of ferrous sulphate and non-ionic iron-polymaltose complex on markers of oxidative tissue damage in patients with inflammatory bowel disease. Alimentary Pharmacology and Therapeutics. 22: 831-838.
  • Erichsen, Kari; Ulvik, Rune Johan; Nysæter, Gunnar; Johansen, Jack; Ostborg, Jens; Berstad, Arnold; Berge, Rolf Kristian; Hausken, Trygve. 2005. Oral ferrous fumarate or intravenous iron sucrose for patients with inflammatory bowel disease. Scandinavian Journal of Gastroenterology. 40: 1058-1065. doi: 10.1080/00365520510023198
  • Gilja, Odd Helge; Hausken, Trygve; Ødegaard, Svein; Berstad, Arnold. 2005. Ultrasonography and three-dimensional methods of the upper gastrointestinal tract. European Journal of Gastroenterology and Hepathology. 17: 277-282.
  • Gilja, Odd Helge; Hausken, Trygve; Ødegaard, Svein; Lunding, Johan Axel; Berstad, Arnold. 2005. Gastric accommodation and ultrasonography. Neurogastroenterology and Motility. 17: 155-155.
  • Hjelland, Ina Elen; Oveland, Nils Petter; Leversen, Katrine Tyborg; Berstad, Arnold; Hausken, Trygve. 2005. Insulin-induced hypoglycemia stimulates gastric vagal activity and motor function without increasing cardiac vagal activity. Digestion. 72: 43-48. doi: 10.1159/000087600
  • Lied, Gülen Arsland; Lind, Ragna; Florvaag, Erik; Berstad, Arnold. 2005. Berstad A. Matoverfølsomhet hos voksne – nye studier om mulige årsaker. Fagbladet Allergi i praksis. 2: 12-17.
  • Lind, Ragna Anne; Arslan, Gülen; Eriksen, Hege Randi; Kahrs, Gudrun; Haug, Tone Tangen; Florvaag, Erik; Berstad, Arnold. 2005. Subjective health complaints and modern health worries in patients with subjective food hypersensitivity. Digestive Diseases and Sciences. 50: 1245-1251.
  • Milde, Anne Marita; Arslan, Gülen; Overmier, James Bruce; Berstad, Arnold; Murison, Robert. 2005. An acute stressor enhances sensitivity to a chemical irritant and increases 51-CrEDTA permeability of the colon in adult rats. Integrative Physiological & Behavioral Science. 40: 35-44.
  • Arslan, Gülen; Kahrs, G.E.; Lind, Ragna Anne; Frøyland, Livar; Florvaag, Erik; Berstad, Arnold. 2004. Patients with subjective food hypersensitivity: the value of analyzing intestinal permeability and inflammation markers in gut lavage fluid. Digestion. 70: 26-35. doi: 10.1159/000080078
  • Arslan, Gülen; Lind, Ragna Anne; Olafsson, S.; Florvaag, Erik; Berstad, Arnold. 2004. Quality of life in patients with subjective food hypersensitivity: applicability of the 10-item short form of the Nepean Dyspepsia Index. Digestive Diseases and Sciences. 49: 680-687.
  • Berstad, Arnold; Nysaeter, G.; Berstad, Audun. 2004. Innvollsorm mot inflammatorisk tarmsykdom. Tidsskrift for Den norske legeforening. 124: 3220-3221.
  • Bjørkkjær, T.; Brunborg, L.A.; Arslan, Gülen; Lind, Ragna Anne; Brun, Johan G; Valen, M.; Klementsen, B.; Berstad, Arnold; Frøyland, Livar. 2004. Reduced joint pain after short-term duodenal administration of seal oil in patients with inflammatory bowel disease: comparison with soy oil. Scandinavian Journal of Gastroenterology. 39: 1088-1094.
  • Erichsen, Kari; Lied, Gülen Arsland; Olderøy, G; Hausken, Trygve; Berstad, Arnold. 2004. Calprotectin in faeces and gut lavage fluid; relationship to intestinal permeability and disease activity in IBD. Scandinavian Journal of Gastroenterology. 39: 8-8.
  • Henriksen, T.H.; Lerang, F.; Lia, A.; Schøyen, R.; Thoresen, T.; Berge, T.; Ragnhildstveit, E.; Tveten, Y.; Berstad, Arnold. 2004. Laboratory handling of Helicobacter pylori critically influences the results of in-vitro metronidazole resistance determination. Clinical Microbiology and Infection. 10: 315-321.
  • Hjelland, Ina; Ofstad, A.P.; Narvestad, J.K.; Berstad, Arnold; Hausken, Trygve. 2004. Drink tests in functional dyspepsia: which drink is best? Scandinavian Journal of Gastroenterology. 39: 933-937.
  • Lied, Gülen Arsland; Kahrs, Gudrun Elise; Lind, Ragna; Frøyland, Livar; Florvaag, Erik; Berstad, Arnold. 2004. Patients with subjective food hypersensitivity: The value of analysing intestinal permeability and inflammation markers in gut lavage fluid. Digestion. 70: 26-35.
  • Lied, Gülen Arsland; Lind, Ragna; Olafsson, Snorri; Florvaag, Erik; Berstad, Arnold. 2004. Quality of life in patients with subjective food hypersensitivity: Applicability of the 10-item short form of the Nepean Dyspepsia Index. Digestive Diseases and Sciences. 49: 680-687.
  • Wilhelmsen, Ingvard; Berstad, Arnold. 2004. Reduced Relapse Rate in Duodenal Ulcer Disease Leads to Normalization of Psychological Distress: Twelve-year Follow-up. Scandinavian Journal of Gastroenterology. 39: 717-721.
  • Berstad, Arnold; Aabakken, L; Bjøro, K. 2003. Editorial Status, 2003. Scandinavian Journal of Gastroenterology. 1. 123.
  • Erichsen, Kari; Hausken, Trygve; Ulvik, Rune Johan; Svardal, A.; Berstad, Arnold; Berge, Rolf Kristian. 2003. Ferrous fumarate deteriorated plasma antioxidant status in patients with Crohn disease. Scandinavian Journal of Gastroenterology. 38: 543-548.
  • Lied, Gülen Arsland; Bjørkkjær, Tormod; Brunborg, Linn Anne Bjelland; Valen, Merete; Brun, Johan G; Frøyland, Livar; Berstad, Arnold. 2003. Seal oil compared to soy oil in patients with inflammatory bowel disease. Gastroenterology. 124: 67-67.
  • Lind, Ragna; Lied, Gülen Arsland; Eriksen, Hege Randi; Florvaag, Erik; Berstad, Arnold. 2003. Subjective health complaints and quality of life in patients with self-reported adverse reactions to food. Scandinavian Journal of Gastroenterology, Supplement. 38: 15-15.
  • Milde, Anne Marita; Arslan, Gülen; Roseth, Arne; Berstad, Arnold; Overmier, James Bruce; Murison, Robert. 2003. Intestinal permeability and faecal granulocyte marker protein in dextran sulphate sodium - induced colitis in rats. Scandinavian Journal of Laboratory Animal Science. 30: 169-175.
  • Olafsdottir, Edda Jonina; Gilja, Odd Helge; Tefera, Solomon; Fluge, G; Berstad, Arnold. 2003. Intragastric maldistribution of a liquid meal in children with recurrent abdominal pain assessed by three-dimensional ultrasonography. Scandinavian Journal of Gastroenterology. 38: 819-825.
  • Olafsson, S.; Berstad, Arnold. 2003. Changes in food tolerance and lifestyle after eradication of Helicobacter pylori. Scandinavian Journal of Gastroenterology. 38: 268-276.
  • Tytgat, G.N.; Heading, R.C.; Müller-Lissner, S.; Kamm, M.; Schölmerich, J.; Berstad, Arnold; Fried, M.; Chaussade, S.; Jewell, D.; Briggs, A. 2003. Contemporary understanding and management of reflux and constipation in the general population and pregnancy: a consensus meeting. Alimentary Pharmacology and Therapeutics. 18: 301-301.
  • Arslan, Gülen; Brunborg, Linn Anne; Frøyland, Livar; Brun, Johan G; Valen, Merete; Berstad, Arnold. 2002. Effects of duodenal seal oil administration in patients with inflammatory bowel disease. Lipids. 27: 935-940.
  • Arslan, Gülen; Ødegaard, Svein; Elsayed, Said; Florvaag, Erik; Berstad, Arnold. 2002. Food allergy and intolerance: response to intestinal provocation monitored by endosonography. European Journal of Ultrasound. 15: 29-36.
  • Berstad, Arnold. 2002. COX-2-hemmere til pasienter med inflammatorisk tarmsykdom. Tidsskrift for Den norske legeforening. 122: 2651-2651.
  • Berstad, Arnold. 2002. Ikke glem antacida. Tidsskrift for Den norske legeforening. 122: 2034-2034.
  • Berstad, Audun Elnæs; Berstad, Kjetil; Berstad, Arnold. 2002. pH-activated phospholipase A2: an important mucosal barrier breaker in peptic ulcer disease. Scandinavian Journal of Gastroenterology. 37: 738-742.
  • Gilja, Odd Helge; Heimdal, Andreas; Hausken, Trygve; Gregersen, Hans; Matre, Knut; Berstad, Arnold; Ødegaard, Svein. 2002. Strain during gastric contractions can be measured using Doppler ultrasonography. Ultrasound in Medicine and Biology. 28: 1457-1465.
  • Gregersen, Hans; Gilja, Odd Helge; Hausken, Trygve; Heimdal, Andreas; Gao, Chunwen; Matre, Knut; Ødegaard, Svein; Berstad, Arnold. 2002. Mechanical properties in the human gastric antrum using B-mode ultrasonography and antral distension. American Journal of Physiology - Gastrointestinal and Liver Physiology. 283: G368-G375.
  • Hjelland, Ina; Hausken, Trygve; Svebak, Sven; Olafsson, Snorri; Berstad, Arnold. 2002. Vagal tone and meal-induced abdominal symptoms in healthy subjects. Digestion. 65: 172-176.
  • Lied, Gülen Arsland; Brunborg, Linn Anne Bjelland; Frøyland, Livar; Brun, Johan G; Valen, Merete; Berstad, Arnold. 2002. Effects of duodenal seal oil administration in patients with inflammatory bowel disease. Lipids. 37: 935-940.
  • Olafsdottir, Edda Jonina; Aksnes, Lage; Fluge, Gjermund; Berstad, Arnold. 2002. Faecal calprotectin levels in infants with infantile colic, healthy infants, children with inflammatory bowel disease, children with recurrent abdominal pain and healthy children. Acta Paediatrica. 91: 45-50.
  • Olafsson, Snorri; Hatlebakk, Jan G; Berstad, Arnold. 2002. Patients with endoscopic gastritis and/or duodenitis improve markedly following eradication of Helicobacter pylori, although less so than patients with ulcers. Scandinavian Journal of Gastroenterology. 37: 1386-1394.
  • Rystedt, E.; Olin, M.; Seyama, Y.; Buchmann, M.; Berstad, Arnold; Eggertsen, G.; Björkheim, Ingemar. 2002. Cerebrotendinous xanthomatosis: molecular characterization of two Scandinavian sisters. Journal of Internal Medicine. 252: 259-264.
  • Tefera, Solomon; Gilja, Odd Helge; Olafsdottir, Edda; Hausken, Trygve; Hatlebakk, Jan G; Berstad, Arnold. 2002. Intragastric maldistribution of a liquid meal in patients with reflux oesophagitis assessed by three dimensional ultrasonography. Gut. 50: 153-158.
  • Tefera, Solomon; Hatlebakk, Jan G; Berstad, Audun Elnæs; Berstad, Arnold. 2002. Eradication of Helicobacter pylori does not increase acid reflux in patients with mild to moderate reflux oesophagitis. Scandinavian Journal of Gastroenterology. 37: 877-883.
  • Vaage, Villy; Solhaug, Jan Helge; Berstad, Arnold; Svanes, Knut; Viste, Asgaut. 2002. Jejunoileal bypass in the treatment of morbid obesity: a 25-year follow-up study of 36 patients. Obesity Surgery. 12: 312-318.
  • Arslan, Gülen; Berstad, Arnold. 2001. The levels of calprotectin in inflammatory bowel diseases. Güncel Gastroenteroloji (Turky). 5: 84-88.
  • Berstad, Arnold. 2001. Den vennlige høvdingen. Bergens Tidende. Published 2001-09-24.
  • Berstad, Arnold. 2001. God bok om stress og sykdom. G. Dotevall (forfatter): Stress och psykosomatisk sjukdom. Fremst mag-tarmbesvær. Tidsskrift for Den norske legeforening. 121: 2977.
  • Berstad, Arnold. 2001. Astaxanthin – en spennende historie. Fordøyelsen. 13: 5-6.
  • Berstad, Arnold. 2001. Reaksjoner på mat – stress eller allergi? Fagbladet Allergi i praksis. 2: 6-9.
  • Berstad, Arnold; Olafsson, Snorri; Tefera, Solomon; Hatlebakk, Jan Gunnar; Gilja, Odd Helge; Hausken, Trygve. 2001. Controversies in dyspepsia. European Journal of Surgery Supplement. 586: 4-11.
  • Folvik, Geir; Nesje, Lars Birger; Berstad, Arnold; Ødegaard, Svein. 2001. Endosonography-guided endoscopic band ligation of Dieulafoy's malformation. A case report. Endoscopy. 33: 636-638.
  • Olafsdottir, Edda Jonina; Ellertsen, Bjørn; Berstad, Arnold; Fluge, Gjermund. 2001. Personality profiles and heart rate variability (vagal tone) in children with recurrent abnominal pain. Acta Paediatrica. 90: 632-637.
  • Tefera, Solomon; Gilja, Odd Helge; Hatlebakk, Jan Gunnar; Berstad, Arnold. 2001. Gastric accommodation studied by ultrasonography in patients with reflux esophagitis. Digestive Diseases and Sciences. 46: 618-625.
  • Tefera, Solomon; Hatlebakk, Jan Gunnar; Berstad, Arnold. 2001. Stability of gastric secretory inhibition during 6-month treatment with omeprazole in patients with gastroesophageal reflux disease. American Journal of Gastroenterology. 96: 969-974.
  • Berstad, Arnold. 2000. Functional dyspepsia - a conceptual framework. Gut. 47: 3-4.
  • Berstad, Arnold. 2000. Er Crohns sykdom en atypisk mykobakteriose? Fordøyelsen. 2. 14-15.
  • Berstad, Arnold; Arslan, G; Folvik, Geir. 2000. Relationship between intestinal permeability and calprotectin concentration in gut lavage fluid. Scandinavian Journal of Gastroenterology. 35: 64-69.
  • Berstad, Arnold; Lied, Gülen Arsland; Folvik, Geir. 2000. Relationship between intestinal permeability and calprotectin concentration in gut lavage fluid. Scandinavian Journal of Gastroenterology. 35.
  • Hatlebakk, Jan G; Madsen, Per H; Walle, Per O; Berstad, Arnold. 2000. Heartburn treatment in primary care. Letter to the editor. BMJ (British Medical Journal). 320: 1406.
  • Henriksen, T. H.; Lia, A.; Schøyen, R.; Thoresen, T.; Berstad, Arnold. 2000. Assessment of optimal atmospheric conditions for growth of Helicobacter pylori. European Journal of Clinical Microbiology and Infectious Diseases. 19: 718-720.
  • Nysæter, G; Berstad, Arnold. 2000. Crohns sykdom - ubalanse mellom tarm og tarminnhold? Fordøyelsen. 3. 8-9.
  • Olafsdottir, Edda Jonina; Gilja, Odd Helge; Aslaksen, Aslak; Berstad, Arnold; Fluge, Gjermund. 2000. Impaired accommodation of the proximal stomach in children with recurrent abdominal pain. Journal of Pediatric Gastroenterology and Nutrition - JPGN. 30: 158-164.
  • Svebak, Sven; Søndenaa, Karl; Hausken, Trygve; Søreide, Odd; Hammar, Åsa; Berstad, Arnold. 2000. The significance of personality in pain from gallbladder stone. Scandinavian Journal of Gastroenterology. 35: 759-764.
  • Svebak, Sven; Søndenaa, Karl; Søndenaa, Karl; Hausken, Trygve; Søreide, Odd; Søreide, Odd; Hammar, Åse; Hammar, Åse; Berstad, Arnold; Berstad, Arnold. 2000. The significance of personality in pain from gallbladder stone. Scandinavian Journal of Gastroenterology. 35: 759-764.
Reports and theses
  • Hystad, Hilde Tang; Valeur, Jørgen; Berstad, Arnold. 2012. Bør pasienter med irritabel tarm spise mindre tungt fordøyelige karbohydrater? Universitetet i Bergen. 5 pages.
  • Halvorsen, Ragnhild; Berstad, Arnold; Lassen, Jørgen Fr; Midtvedt, Tore; Narvhus, Judith. 2009. The use of probiotics for patients in hospitals. A benefit and risk assessment. Opinion of the Steering Committee of the Norwegian Scientific Committee for Food Safety. VKM Report. 2009:14. Norwegian Scientific Committee for Food Safety (VKM), Oslo, Norway. 29 pages.
  • Yazdankhah, S; Lassen, J.; Narvhus, Judith; Halvorsen, Ragnhild; Berstad, Arnold; Midtvedt, Tore. 2008. The use of probiotics for patients in hospital. A risk assessment. Norwegian Scientific Committeee for Food Safety. Folkehelseinstituttet.
  • Farup, Per Grønaas; Berstad, Arnold. 2002. Magesår skyldes bakterie - ikke stress. Norges forskningsråd, Oslo. 40 pages.
Book sections
  • Berstad, Arnold; Valeur, Jørgen. 2018. Dessertmage. Kroppen og kulturen, pages 46-47. In:
    • Lærum, Ole Didrik. 2018. Verken syk eller frisk. Sunnhet og sykdom er ikke lenger hva de var. Fagbokforlaget. 133 pages. ISBN: 978-82-450-2441-8.
  • Bernhoft, Aksel; Midtvedt, Tore; Eggesbø, Merete Åse; Aas, Anne-Marie; Berstad, Arnold; Harstad, Odd Magne; Wold, Agnes; Vatn, Morten H; Rudi, Knut; Paulsen, Jan Erik; Trøseid, Marius; Raa, Jan; Valeur, Jørgen; Garborg, Kjetil Kjeldstad; Holst-Jensen, Arne. 2017. Tarmens viktige mikrober - hvordan mater vi dem, og hva gjør de med oss? Bernhoft, Aksel (red), pages 438-453. In:
    • Astad, Anne-Marie; Havelin, Gro. 2017. Årbok 2016 Det Norske Videnskaps-Akademi. Novus Forlag. 453 pages. ISBN: 978-82-7099-888-3.
  • Berstad, Arnold; Valeur, Jørgen. 2016. Dessertmage. Kroppen og kulturen: Et grunnlag for å forstå sykdom. In:
    • Hem, Erlend. 2016. Verken syk eller frisk. Sunnhet og sykdom er ikke lenger hva de var. 133 pages. ISBN: 9788280701190.
  • Valeur, Jørgen; Berstad, Arnold. 2014. Sykdommer i fordøyelseskanalen. Kapittel 30, pages 496-503. In:
    • Dahl, Alv A; Aare, Trond F; Loge, Jon Håvard. 2014. Psykiske reaksjoner ved somatisk sykdom. Cappelen Damm Akademisk. 736 pages. ISBN: 9788202418786.
  • Berstad, Arnold. 2006. Veiledning av doktorander midt i sykehushverdagen. 4:1, pages 294-302. In:
    • Dysthe, Olga; Samara, Akylina. 2006. Forskningsveiledning på master - og doktorgradsnivå. Abstrakt forlag. 353 pages. ISBN: 82-7935-207-4.
  • Berstad, Arnold; Gilja, Odd Helge. 2005. Ultrasonographic Alterations in Functional Dyspepsia. Kapittel 14, pages 397-422. In:
    • Ødegaard, Svein; Gilja, Odd Helge; Gregersen, Hans. 2005. Basic and New Aspects of Gastrointestinal Ultrasonography. World Scientific. 502 pages. ISBN: 981-238-845-1.
  • Berstad, Arnold; Farup, Per. 2002. Magesår skyldes en bakterie – ikke stress. 31-32. In:
    • [Mangler etternavn], [Mangler fornavn]. 2002. Forskning – en forutsetning for god pasientbehandling. 21 eksempler på forskning som gir viktige bidrag. ISBN: 82-12-01753-2.
  • Hatlebakk, Jan G; Berstad, Arnold. 2001. Endoscopic Classification of Gastroesophageal Reflux Disease. In:
    • Attwood, S.; Tilanus, H. W. 2001. Barret's Esophagus.

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