Jeg jobber både med ernæringsepidemiologi og klinisk ernæring. 

Epidemiologiske prosjekter omfatter analyse av kosthold og kroniske, ikke-smittsomme sykdommer som hjerte-kar, kreft, fedme og diabetes, men også nevrodegenerative sykdommer. Jeg har ledet ernæringsdelen av HUSK3 (Helseundersøkelsen i Hordaland, 2018-2021, se https://husk.w.uib.no/. I HUSK undersøker vi,i en eldre kohorte, sammenhengen av kosthold med vektutvikling og muskel helse, forkomst av diabetes og med Parkinson sykdom. Også undersøker vi kosthold og risiko for Parkinson sykdom i den europeiske EPIC kohorten, i lag med DKFZ Heidelberg i Tyskland (https://www.dkfz.de/epidemiologie-von-krebserkrankungen/epic). Videre er jeg interessert i årsaker og konsekvenser av sykdoms-relatert underernæring.  

Vi gjennomfører kliniske studier med matvarer, ingredienser og med næringsstoffer. Vi er spesielt interessert i helseeffekter av brød, fullkorn og kostfiber, og har gjennomført en del studier med brød, beta-glucan og andre kostfibertyper. Vi fikk støtte fra EU til et internasjonalt forskningsprosjekt Carbhealth (https://www.healthydietforhealthylife.eu/project/carbhealth) og gjennomførte også en store vekttap-studie med ulike dietter som del av Mohn Nutrition Research Laboratory (Trond Mohn stiftelse (tidligere Bergen research foundation) https://www.nohnfoundation.no/); https://www.uib.no/en/nutrition/120713/about-mohn-nutrition-research-lab

Videre er jeg interessert i helse effekter av mikroplast. Her forsker vi på dyrestudier på effekter av mikroplast, men gjennomfører også observasjonsstudier hos mennesker. Vi fikk her støtte fra UiB gjennom det marine satsningsområdet og  EU gjennom SEAS programmet https://www4.uib.no/en/research/research-projects/seas-shaping-european-research-leaders-for-marine-sustainability

 

 

Flere foredrag både i Norge og andre land, for eksempel 

https://www.dge.de/veranstaltungen/tagungen/arbeitstagung-2025/

Medlem i "systematic review centre" til nordiske ernæringsanbefalinger 2023 (aktiv fra 2020-2023)

Nestleder i Norsk selskap for ernæring https://norskselskapforernaering.no/

Styremedlem i Plastnetverk ved UiB og organisasjon av årlig mikroplast symposium 

Courses

Bachelorprogram in Human Nutrition

NUTR100   Introduction to clinical nutrition

NUTR203   Nutrition Physiology

NUTR290   Bachelor thesis

 

Masterprogram in Clinical Nutrition

ELMED326 Genetic disorders in Nutrient Metabolism

NUCLI390A og B Master thesis 

Vitenskapelig artikkel

• Brian Buijsse; Heiner Boeing; Frank Hirche et al. (2013). Plasma 25-hydroxyvitamin D and its genetic determinants in relation to incident type 2 diabetes: a prospective case-cohort study. (ekstern lenke)
• Romina di Giuseppe; Tilman Kühn; Frank Hirche et al. (2015). Plasma fibroblast growth factor 23 and risk of cardiovascular disease: results from the EPIC-Germany case-cohort study. (ekstern lenke)
• Therese Karlsson; Elin Strand; Jutta Dierkes et al. (2017). Associations between intake of fish and n-3 long-chain polyunsaturated fatty acids and plasma metabolites related to the kynurenine pathway in patients with coronary artery disease. (ekstern lenke)
• Anthea van Parys; Jostein Sæle; Nathalie Genevieve Puaschitz et al. (2022). The association between dairy intake and risk of cardiovascular disease and mortality in patients with stable angina pectoris. (ekstern lenke)
• Sieglinde Zelzer; Andreas Meinitzer; Dietmar Enko et al. (2024). Classification of Vitamin D Status Based on Vitamin D Metabolism: A Randomized Controlled Trial in Hypertensive Patients. (ekstern lenke)
• Alice Refosco; Jutta Dierkes; Tanja Kögel et al. (2025). Microplastics in human feces: a pilot study exploring links with dietary habits. (ekstern lenke)
• Simon Ballance; Hanne Kirsti Mæhre; Anne Rieder et al. (2022). The solution properties of galactomannan after simulated digestion of guar fortified bread predict the extent of postprandial insulin reduction in healthy adult overweight subjects. (ekstern lenke)
• Hanne Rosendahl-Riise; Ulrike Spielau; Anette Hylen Ranhoff et al. (2017). Vitamin D supplementation and its influence on muscle strength and mobility in community-dwelling older persons: a systematic review and meta-analysis. (ekstern lenke)
• Alain Dominique Starke; Jutta Dierkes; Gülen Arslan Lied et al. (2025). Supporting healthier food choices through AI-tailored advice: A research agenda. (ekstern lenke)
• Ulrike Lehmann; Frank Hirche; Gabriele I. Stangl et al. (2013). Bioavailability of vitamin D-2 and D-3 in healthy volunteers, a randomized placebo-controlled trial. (ekstern lenke)
• Anthea Van Parys; Jutta Dierkes; Vegard Lysne et al. (2020). No effect of plasma trimethylamine N-Oxide (TMAO) and plasma trimethyllysine (TML) on the association between choline intake and acute myocardial infarction risk in patients with stable angina pectoris. (ekstern lenke)
• Anthea van Parys; Therese Karlsson; Kathrine Vinknes et al. (2021). Food Sources Contributing to Intake of Choline and Individual Choline Forms in a Norwegian Cohort of Patients With Stable Angina Pectoris. (ekstern lenke)
• Hanne Rosendahl-Riise; Therese Karlsson; Christian A Drevon et al. (2018). Total and lean fish intake is positively associated with bone mineral density in older women in the community-based Hordaland Health Study. (ekstern lenke)
• Teresa Risan Haugsgjerd; Jutta Dierkes; Stein Emil Vollset et al. (2016). Association between weight change and mortality in community living older people followed for up to 14 years. The Hordaland Health Study (HUSK). (ekstern lenke)
• Benuarda Toto; Alice Refosco; Maria O'Keeffe et al. (2022). Intestinal permeability and gene expression after polyethylene and polyamide microplastic ingestion in Wistar rats. (ekstern lenke)
• Theogene Habumugisha; Ingunn Marie Stadskleiv Engebretsen; Inger Elisabeth Måren et al. (2023). Reducing meat and/or dairy consumption in adults: a systematic review and meta-analysis of effects on protein intake, anthropometric values, and body composition. (ekstern lenke)
• Åslaug Matre Anfinsen; Hanne Rosendahl-Riise; Ottar Kjell Nygård et al. (2023). Exploratory analyses on the effect of time since last meal on concentrations of amino acids, lipids, one-carbon metabolites, and vitamins in the Hordaland Health Study. (ekstern lenke)
• Jutta Dierkes; Stefan Dietrich; Klaus Abraham et al. (2022). Stable isotope ratios of nitrogen and carbon as biomarkers of a vegan diet. (ekstern lenke)
• Zoya Sabir; Jutta Dierkes; Anette Hjartåker et al. (2023). The association of dietary patterns with muscle mass and strength in old age: The Hordaland Health Study. (ekstern lenke)

Konferanseposter

• Damaris Benny Daniel; Alice Refosco; OCL Mastad et al. (2024). Microplastics in human feces and their correlation with dietary behavior: A pilot study. (ekstern lenke)
• Nathalie Genevieve Puaschitz; Elin Strand; Tone Merete Norekvål et al. (2013). Dietary intake of saturated fat and risk of coronary events in patients with angina pectoris. (ekstern lenke)

Rettelse i tidsskrift

• Ingrid Revheim; Simon Ballance; Adelheid Fretland Standal et al. (2024). Correction to: The acute effect of a β-glucan-enriched oat bread on gastric emptying, GLP-1 response, and postprandial glycaemia and insulinemia: a randomised crossover trial in healthy adults (Nutrition & Metabolism, (2024), 21, 1, (13), 10.1186/s12986-024-00789-w). (ekstern lenke)

Doktorgradsavhandling

• Benuarda Toto; Jutta Dierkes; Gülen Arslan Lied et al. (2024). Microplastic toxicity: An investigation of micro- and nanoplastics and their effects on aquatic life and intestine function/permeability in rats. (ekstern lenke)

Vitenskapelig litteraturgjennomgang

• Ingunn Marie S. Engebretsen; Tanya Doherty; Christiane Horwood et al. (2018). Development and challenges to breastfeeding in sub-Saharan Africa. (ekstern lenke)
• Christel Lamberg-Allardt; Linnea Bärebring; Erik Kristoffer Arnesen et al. (2023). Animal versus plant-based protein and risk of cardiovascular disease and type 2 diabetes: a systematic review of randomized controlled trials and prospective cohor t studies. (ekstern lenke)

Se en fullstendig oversikt over publikasjoner i NVA.

Utvalgte Publikasjoner 

2025

Hjorth T, Schadow A, Revheim I, Spielau U, Meyer K, Rieder A, Varela P, Ballance S, Koerner A, Landberg R, Buyken AE, Dierkes J, Rosendahl-Riise H. Effectiveness of regular oat β-glucan-enriched bread compared with whole-grain wheat bread on long-term glycemic control in adults at risk of type 2 diabetes: a randomized controlled trial. Am J Clin Nutr. 2025 Sep;122(3):724-732. doi: 10.1016/j.ajcnut.2025.06.018.

2024

Trollebø MA, Tangvik RJ, Skeie E, Grønning MK, Nygård O, Eagan TML, Dierkes J. Malnutrition as a prognostic factor for 2-year mortality in hospitalized patients in Norway: A matched cohort study. JPEN J Parenter Enteral Nutr. 2024 Apr;48(3):308-317. doi: 10.1002/jpen.2619.

2023

Sabir Z, Dierkes J, Hjartåker A, Rosendahl-Riise H. The association of dietary patterns with muscle mass and strength in old age: The Hordaland Health Study. Eur J Nutr. 2023 Oct;62(7):2739-2750. doi: 10.1007/s00394-023-03206-9.

2022

Ballance S, Mæhre HK, Rieder A, Arslan Lied G, Hindar Tvedt EK, Dierkes J. The solution properties of galactomannan after simulated digestion of guar fortified bread predict the extent of postprandial insulin reduction in healthy adult overweight subjects. Food Funct. 2022 Oct 3;13(19):9810-9821. doi: 10.1039/d2fo01762h. 

Toto B, Refosco A, O'Keeffe M, Barkhald ØH, Brønstad A, Lied GA, Yadetie F, Goksøyr A, Kögel T, Dierkes J. Intestinal permeability and gene expression after polyethylene and polyamide microplastic ingestion in Wistar rats. Toxicol Lett. 2022 Nov 1;370:35-41. doi: 10.1016/j.toxlet.2022.09.002.