Thomas Olsen

Postdoctoral Fellow - Division of Clinical Nutrition

Norwegian version of this page

Email thomas.olsen@medisin.uio.no

Phone +47 22851524

Username

Visiting address Sognsvannsveien 9 Domus Medica 0372 Oslo

Postal address Postboks 1046 Blindern 0317 Oslo

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Academic interests

Sulphur amino acids, methionine and cysteine restriction, B-vitamins, vitamin A, epidemiology

Teaching

MED1100
MED2200
ERN3120
ERN2300
ERN3400
ERN4300

Background

MSc in human nutrition from the University of Bergen. Relevant work experience includes positions as a nutritional consultant, college level lecturer and guest researcher before PhD period and postdoctoral fellowship.

Partners

University of Oxford, UK
Charles University and General University Hospital, Czech Republic
Maastricht University, Netherlands

Tags: B-vitamins, homocysteine, sulphur amino acids, epidemiology, vitamin A

van Parys, Anthea; Karlsson, Therese; Vinknes, Kathrine; Olsen, Thomas; Øyen, Jannike & Dierkes, Jutta [Show all 8 contributors for this article] (2021). Food Sources Contributing to Intake of Choline and Individual Choline Forms in a Norwegian Cohort of Patients With Stable Angina Pectoris. Frontiers in Nutrition. ISSN 2296-861X. 8, p. 1–8. doi: 10.3389/fnut.2021.676026. Full text in Research Archive
Stolt, Emma Theresia Kjelland; Olsen, Thomas; Elshorbagy, Amany; Kozich, Viktor; Van Greevenbroek, Marleen M.J. & Øvrebø, Bente [Show all 10 contributors for this article] (2021). Sulfur amino acid restriction, energy metabolism and obesity: a study protocol of an 8-week randomized controlled dietary intervention with whole foods and amino acid supplements. Journal of Translational Medicine. ISSN 1479-5876. 19. doi: 10.1186/s12967-021-02824-3. Full text in Research Archive
Dhar, Indu; Svingen, Gard Frodahl Tveitevåg; Olsen, Thomas; Lysne, Vegard; Bjørnestad, Espen Øglænd & Ueland, Per Magne [Show all 7 contributors for this article] (2021). β-blocker use and risk of all-cause mortality in patients with coronary heart disease: effect modification by serum vitamin A. European Journal of Preventive Cardiology (EJPC). ISSN 2047-4873. doi: 10.1093/eurjpc/zwaa158. Full text in Research Archive
Matre, Åslaug Oddsdatter; Van Parys, Anthea; Olsen, Thomas; Haugsgjerd, Teresa Risan; Baravelli, Carl Michael & Nygård, Ottar [Show all 8 contributors for this article] (2021). The Association of Meat Intake With All-Cause Mortality and Acute Myocardial Infarction Is Age-Dependent in Patients With Stable Angina Pectoris. Frontiers in Nutrition. ISSN 2296-861X. 8, p. 1–10. doi: 10.3389/fnut.2021.642612. Full text in Research Archive
Olsen, Thomas; Øvrebø, Bente; Turner, Cheryl; Bastani, Nasser Ezzatkhah; Refsum, Helga & Vinknes, Kathrine (2021). Effects of short-term methionine and cysteine restriction and enrichment with polyunsaturated fatty acids on oral glucose tolerance, plasma amino acids, fatty acids, lactate and pyruvate: results from a pilot study. BMC Research Notes. ISSN 1756-0500. 14(43). doi: 10.1186/s13104-021-05463-5. Full text in Research Archive
Dhar, Indu; Siddique, Sumia; Pedersen, Eva Kristine Ringdal; Svingen, Gard Frodahl Tveitevåg; Lysne, Vegard & Olsen, Thomas [Show all 12 contributors for this article] (2020). Lipid parameters and vitamin A modify cardiovascular risk prediction by plasma neopterin. Heart. ISSN 1355-6037. 106, p. 1073–1079. doi: 10.1136/heartjnl-2019-316165. Full text in Research Archive
Olsen, Thomas; Sollie, Ove; Nurk, Eha; Turner, Cheryl; Jernerén, Fredrik & Ivy, John L. [Show all 10 contributors for this article] (2020). Exhaustive Exercise and Post-exercise Protein Plus Carbohydrate Supplementation Affect Plasma and Urine Concentrations of Sulfur Amino Acids, the Ratio of Methionine to Homocysteine and Glutathione in Elite Male Cyclists. Frontiers in Physiology. ISSN 1664-042X. doi: 10.3389/fphys.2020.609335. Full text in Research Archive Show summary
Plasma and tissue sulfur amino acid (SAA) availability are crucial for intracellular methylation reactions and cellular antioxidant defense, which are important processes during exercise and in recovery. In this randomized, controlled crossover trial among eight elite male cyclists, we explored the effect of exhaustive exercise and post-exercise supplementation with carbohydrates and protein (CHO+PROT) vs. carbohydrates (CHO) on plasma and urine SAAs, a potential new marker of methylation capacity (methionine/total homocysteine ratio [Met/tHcy]) and related metabolites. The purpose of the study was to further explore the role of SAAs in exercise and recovery. Athletes cycled to exhaustion and consumed supplements immediately after and in 30 min intervals for 120 min post-exercise. After ~18 h recovery, performance was tested in a time trial in which the CHO+PROT group cycled 8.5% faster compared to the CHO group (41:53 ± 1:51 vs. 45:26 ± 1:32 min, p
Lee-Ødegård, Sindre; Gulseth, Hanne Løvdal; Langleite, Torgrim Mikal; Norheim, Frode; Olsen, Thomas & Refsum, Helga [Show all 9 contributors for this article] (2020). Branched-chain amino acid metabolism, insulin sensitivity and liver fat response to exercise training in sedentary dysglycaemic and normoglycaemic men. Diabetologia. ISSN 0012-186X. 64, p. 410–423. doi: 10.1007/s00125-020-05296-0. Full text in Research Archive
Olsen, Thomas; Turner, Cheryl; Øvrebø, Bente; Bastani, Nasser Ezzatkhah; Refsum, Helga & Vinknes, Kathrine (2020). Postprandial effects of a meal low in sulfur amino acids and high in polyunsaturated fatty acids compared to a meal high in sulfur amino acids and saturated fatty acids on stearoyl CoA-desaturase indices and plasma sulfur amino acids: a pilot study. BMC Research Notes. ISSN 1756-0500. 13. doi: 10.1186/s13104-020-05222-y. Full text in Research Archive
Svendsen, Karianne; Olsen, Thomas; Nordstrand Rusvik, Tove Caroline; Ulven, Stine Marie; Holven, Kirsten Bjørklund & Retterstøl, Kjetil [Show all 7 contributors for this article] (2020). Fatty acid profile and estimated desaturase activities in whole blood are associated with metabolic health. Lipids in Health and Disease. ISSN 1476-511X. 19. doi: 10.1186/s12944-020-01282-y. Full text in Research Archive
Olsen, Thomas; Øvrebø, Bente; Haj Yasein, Nadia; Lee-Ødegård, Sindre; Svendsen, Karianne & Hjorth, Marit [Show all 11 contributors for this article] (2020). Effects of dietary methionine and cysteine restriction on plasma biomarkers, serum fibroblast growth factor 21, and adipose tissue gene expression in women with overweight or obesity: a double-blind randomized controlled pilot study. Journal of Translational Medicine. ISSN 1479-5876. 18(122). doi: 10.1186/s12967-020-02288-x. Full text in Research Archive
Olsen, Thomas & Blomhoff, Rune (2019). Retinol, Retinoic Acid, and Retinol-Binding Protein 4 are Differentially Associated with Cardiovascular Disease, Type 2 Diabetes, and Obesity: An Overview of Human Studies . Advances in Nutrition. ISSN 2161-8313. doi: 10.1093/advances/nmz131. Full text in Research Archive
Olsen, Thomas; Vinknes, Kathrine; Blomhoff, Rune; Lysne, Vegard; Midttun, Øivind & Dhar, Indu [Show all 12 contributors for this article] (2019). Creatinine, total cysteine and uric acid are associated with serum retinol in patients with cardiovascular disease. European Journal of Nutrition. ISSN 1436-6207. doi: 10.1007/s00394-019-02086-2. Full text in Research Archive
Koivisto, Anu; Olsen, Thomas; Paur, Ingvild; Paulsen, Gøran; Bastani, Nasser Ezzatkhah & Garthe, Ina [Show all 10 contributors for this article] (2019). Effects of antioxidant-rich foods on altitude-induced oxidative stress and inflammation in elite endurance athletes: A randomized controlled trial. PLOS ONE. ISSN 1932-6203. 14(6). doi: 10.1371/journal.pone.0217895. Full text in Research Archive
Lee-Ødegård, Sindre; Olsen, Thomas; Vinknes, Kathrine; Refsum, Helga; Gulseth, Hanne Løvdal & Birkeland, Kåre I. [Show all 7 contributors for this article] (2019). Plasma Sulphur-Containing Amino Acids, Physical Exercise and Insulin Sensitivity in Overweight Dysglycemic and Normal Weight Normoglycemic Men. Nutrients. ISSN 2072-6643. 11(1). doi: 10.3390/nu11010010. Full text in Research Archive
Olsen, Thomas; Øvrebø, Bente; Turner, Cheryl; Bastani, Nasser Ezzatkhah; Refsum, Helga & Vinknes, Kathrine (2018). Combining Dietary Sulfur Amino Acid Restriction with Polyunsaturated Fatty Acid Intake in Humans: A Randomized Controlled Pilot Trial. Nutrients. ISSN 2072-6643. 10(12), p. 1–15. doi: 10.3390/nu10121822. Full text in Research Archive
Olsen, Thomas; Vinknes, Kathrine; Svingen, Gard Frodahl Tveitevåg; Pedersen, Eva Ringdal; Dhar, Indu & Tell, Grethe S. [Show all 11 contributors for this article] (2018). The risk association of plasma total homocysteine with acute myocardial infarction is modified by serum vitamin A. European Journal of Preventive Cardiology (EJPC). ISSN 2047-4873. 25(15), p. 1612–1620. doi: 10.1177/2047487318788587. Full text in Research Archive
Olsen, Thomas; Vinknes, Kathrine; Svingen, Gard Frodahl Tveitevåg; Pedersen, Eva Ringdal; Tell, Grethe S. & Blomhoff, Rune [Show all 11 contributors for this article] (2017). Cardiovascular disease risk associated with serum apolipoprotein B is modified by serum vitamin A. Atherosclerosis. ISSN 0021-9150. p. 325–330. doi: 10.1016/j.atherosclerosis.2017.07.020.
Strand, Elin; Pedersen, Eva Ringdal; Svingen, Gard Frodahl Tveitevåg; Olsen, Thomas; Bjørndal, Bodil & Karlsson, Therese [Show all 13 contributors for this article] (2017). Serum acylcarnitines and risk of cardiovascular death and acute myocardial infarction in patients with stable angina pectoris. Journal of the American Heart Association (JAHA). ISSN 2047-9980. 6:e003620(2), p. 1–28. doi: 10.1161/JAHA.116.003620. Full text in Research Archive
Mathisen, Therese Fostervold & Olsen, Thomas (2016). Når kroppsfokus blir patologisk: Sosiale medier, fitness og spiseforstyrret atferd. Norsk Tidsskrift for Ernæring. ISSN 1503-5034. p. 6–11.
Lysne, Vegard; Strand, Elin; Svingen, Gard Frodahl Tveitevåg; Bjørndal, Bodil; Pedersen, Eva Ringdal & Midttun, Øivind [Show all 10 contributors for this article] (2016). Peroxisome Proliferator-Activated Receptor Activation is Associated with Altered Plasma One-Carbon Metabolites and B-Vitamin Status in Rats. Nutrients. ISSN 2072-6643. 8(1). doi: 10.3390/nu8010026. Full text in Research Archive

View all works in Cristin

Svendsen, Karianne; Vinknes, Kathrine; Retterstøl, Kjetil & Olsen, Thomas (2020). Why we can probably trust public policy dietary guidelines for prevention. European Journal of Preventive Cardiology (EJPC). ISSN 2047-4873. doi: 10.1093/eurjpc/zwaa008.
Svendsen, Karianne; Vinknes, Kathrine; Retterstøl, Kjetil & Olsen, Thomas (2020). Why we can probably trust public policy dietary guidelines for prevention. European Journal of Preventive Cardiology (EJPC). ISSN 2047-4873. doi: 10.1093/EURJPC/ZWAA008.
Olsen, Thomas; Øvrebø, Bente; Arnesen, Erik & Lysne, Vegard (2018). Ikke skrot BMI! NRK Ytring.
Lysne, Vegard & Olsen, Thomas (2018). Feilkilder i ernæringsepidemiologi. Norsk Tidsskrift for Ernæring. ISSN 1503-5034.
Olsen, Thomas; Lysne, Vegard & Dahl, Helene (2018). Bedre mot overvekt, bedre for tennene. Kunstig sukker er et folkehelsetiltak. Aftenposten (morgenutg. : trykt utg.). ISSN 0804-3116.
Lysne, Vegard; Olsen, Thomas; Christensen, Jacob J. & Arnesen, Erik (2018). Ja, det er et poeng å bytte til lettbrus! Dagbladet. ISSN 0805-3766.
Øvrebø, Bente; Olsen, Thomas & Vinknes, Kathrine (2017). Stearoyl-CoA desaturase og energimetabolisme – et prosjekt ved Universitetet i Oslo. Norsk Tidsskrift for Ernæring. ISSN 1503-5034. p. 20–22.
Lysne, Vegard & Olsen, Thomas (2017). Konfidensintervaller – hva kan de fortelle deg? Norsk Tidsskrift for Ernæring. ISSN 1503-5034. p. 28–31.
Lysne, Vegard & Olsen, Thomas (2016). P-verdier. Veiledende eller villedende? En simulert studie. Norsk Tidsskrift for Ernæring. ISSN 1503-5034. p. 28–31.