Academic article

• Arve Ulvik; Øivind Midttun; Eva Kristine Ringdal Pedersen et al. (2014). Evidence for increased catabolism of vitamin B-6 during systemic inflammation. (external link)
• Anne Lise Bjørke Monsen; Arve Ulvik; Roy Miodini Nilsen et al. (2016). Impact of Pre-Pregnancy BMI on B Vitamin and Inflammatory Status in Early Pregnancy: An Observational Cohort Study. (external link)
• Björn Gylling; Robin Myte; Arve Ulvik et al. (2019). One-carbon metabolite ratios as functional B-vitamin markers and in relation to colorectal cancer risk. (external link)
• Ellen M Apalset; Clara Gram Gjesdal; Per Magne Ueland et al. (2014). Interferon gamma (IFN-γ)-mediated inflammation and the kynurenine pathway in relation to risk of hip fractures: The Hordaland Health Study. (external link)
• Ellen M Apalset; Clara Gram Gjesdal; Per Magne Ueland et al. (2014). Interferon (IFN)-γ-mediated inflammation and the kynurenine pathway in relation to bone mineral density: The Hordaland Health Study. (external link)
• Anouar Fanidi; Robert Carreras-Torres; Tricia L Larose et al. (2018). Is high vitamin B12 status a cause of lung cancer?. (external link)
• Krasimira Aleksandrova; Shu-Chun Chuang; Heiner Boeing et al. (2015). A prospective study of the immune system activation biomarker neopterin and colorectal cancer risk. (external link)
• Hui Zuo; Per Magne Ueland; Simone Eussen et al. (2015). Markers of vitamin B6 status and metabolism as predictors of incident cancer: The Hordaland Health Study. (external link)
• Thomas Olsen; Kathrine Vinknes; Gard Frodahl Tveitevåg Svingen et al. (2017). Cardiovascular disease risk associated with serum apolipoprotein B is modified by serum vitamin A. (external link)
• Amandeep Kaur Dhillon; Christian Rupp; Annika Bergquist et al. (2021). Associations of neopterin and kynurenine–tryptophan ratio with survival in primary sclerosing cholangitis. (external link)
• Simone Eussen; Roy Miodini Nilsen; Øivind Midttun et al. (2013). North-south gradients in plasma concentrations of B-vitamins and other components of one-carbon metabolism in Western Europe: results from the European Prospective Investigation into Cancer and Nutrition (EPIC) Study. (external link)
• Hui Zuo; Ottar Nygård; Stein Emil Vollset et al. (2017). Smoking, plasma cotinine and risk of atrial fibrillation: the Hordaland Health Study. (external link)
• Gerhard Sulo; Stein Emil Vollset; Ottar Nygård et al. (2013). Neopterin and kynurenine-tryptophan ratio as predictors of coronary events in older adults, the Hordaland Health Study. (external link)
• Iselin Vildmyren; Alfred Halstensen; Adrian McCann et al. (2020). Effect of cod residual protein supplementation on markers of glucose regulation in lean adults: A randomized double-blind study. (external link)
• Audrey Y Jung; Akke Botma; Carolien Lute et al. (2012). Plasma B vitamins and LINE-1 DNA methylation in leukocytes of patients with a history of colorectal adenomas. (external link)
• Ingrid Valheim Hagen; Anita Helland; Marianne Bratlie et al. (2023). Serum concentrations of amino acids and tryptophan metabolites are affected by consumption of a light breakfast: a clinical intervention study in adults with overweight or obesity. (external link)
• Adrian Mccann; Øivind Midttun; Kyly C. Whitfield et al. (2017). Comparable performance characteristics of plasma thiamine and erythrocyte thiamine diphosphate in response to thiamine fortification in rural cambodian women. (external link)
• Ingrid Kristin Torsvik; Trond Markestad; Per Magne Ueland et al. (2013). Evaluating iron status and the risk of anemia in young infants using erythrocyte parameters. (external link)
• Marco Gelpi; Per Magne Ueland; Marius Trøseid et al. (2020). Abdominal Adipose Tissue Is Associated With Alterations in Tryptophan-Kynurenine Metabolism and Markers of Systemic Inflammation in People With Human Immunodeficiency Virus. (external link)
• Ingrid Valheim Hagen; Anita Helland; Marianne Bratlie et al. (2019). TMAO, creatine and 1-methylhistidine in serum and urine are potential biomarkers of cod and salmon intake: a randomised clinical trial in adults with overweight or obesity. (external link)
• Bonnie R. Joubert; Siri Eldevik Håberg; Douglas A. Bell et al. (2014). Maternal smoking and DNA methylation in newborns: In utero effect or epigenetic inheritance?. (external link)
• Maria N. Timofeeva; James D. McKay; George Davey Smith et al. (2011). Genetic polymorphisms in 15q25 and 19q13 Loci, cotinine levels, and risk of lung cancer in EPIC. (external link)
• Simone Eussen; Stein Emil Vollset; Simon Steinar Hustad et al. (2010). Vitamins B2 and B6 and Genetic Polymorphisms Related to One-Carbon Metabolism as Risk Factors for Gastric Adenocarcinoma in the European Prospective Investigation into Cancer and Nutrition. (external link)
• Tore Ivar Malmei Aarsland; Ieva Leskauskaite; Øivind Midttun et al. (2019). The effect of electroconvulsive therapy (ECT) on serum tryptophan metabolites. (external link)
• Arve Ulvik; Simon Steinar Hustad; Adrian Mccann et al. (2017). Ratios of one-carbon metabolites are functional markers of B-vitamin status in a Norwegian coronary angiography screening cohort. (external link)
• 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. (external link)
• Hui Zuo; Per Magne Ueland; Øivind Midttun et al. (2017). Results from the European prospective investigation into cancer and nutrition link vitamin B6 catabolism and lung cancer risk. (external link)
• Øivind Midttun; Adrian Mccann; Ove Aarseth et al. (2016). Combined measurement of 6 fat-soluble vitamins and 26 water-soluble functional vitamin markers and amino Acids in 50 μl of serum or plasma by high-throughput mass spectrometry. (external link)
• Roy Miodini Nilsen; Anne Lise Bjørke Monsen; Øivind Midttun et al. (2012). Maternal tryptophan and kynurenine pathway metabolites and risk of preeclampsia. (external link)
• Maria Christine Magnus; Øystein Karlstad; Øivind Midttun et al. (2016). Maternal plasma total neopterin and kynurenine/tryptophan levels during pregnancy in relation to asthma development in the offspring. (external link)
• Mattias Johansson; Fanidi Anouar; David C. Muller et al. (2014). Circulating biomarkers of one-carbon metabolism in relation to renal cell carcinoma incidence and survival. (external link)
• Eirik Magnus Meek Degerud; Rune Hoff; Ottar Nygård et al. (2015). Cosinor modelling of seasonal variation in 25-hydroxyvitamin D concentrations in cardiovascular patients in Norway. (external link)
• Bonnie R. Joubert; Siri Eldevik Håberg; Roy Miodini Nilsen et al. (2012). 450K epigenome-wide scan identifies differential DNA methylation in newborns related to maternal smoking during pregnancy. (external link)
• Hui Zuo; Per Magne Ueland; Øivind Midttun et al. (2019). Vitamin B6 catabolism and lung cancer risk: Results from the Lung Cancer Cohort Consortium (LC3). (external link)
• Stein-Erik Hafstad Solvang; Allison Hodge; Leiv Watne et al. (2022). Kynurenine Pathway Metabolites in the Blood and Cerebrospinal Fluid Are Associated with Human Aging. (external link)
• Tricia L Larose; Florence Guida; Fanidi Anouar et al. (2018). Circulating cotinine concentrations and lung cancer risk in the Lung Cancer Cohort Consortium (LC3). (external link)
• Lorenzo Galluzzi; Ilio Vitale; Laura Senovilla et al. (2012). Prognostic impact of vitamin B6 metabolism in lung cancer. (external link)
• Bonnie R Joubert; Herman T Den Dekker; Janine F Felix et al. (2016). Maternal plasma folate impacts differential DNA methylation in an epigenome-wide meta-analysis of newborns. (external link)
• Anita Helland; Marianne Bratlie; Ingrid Valheim Hagen et al. (2022). Consumption of a light meal affects serum concentrations of one-carbon metabolites and B-vitamins. A clinical intervention study. (external link)
• Hui Zuo; Grethe S. Tell; Per Magne Ueland et al. (2018). The PAr index, an indicator reflecting altered vitamin B-6 homeostasis, is associated with long-term risk of stroke in the general population: the Hordaland Health Study (HUSK). (external link)
• Vanessa R. da Silva; Luisa Rios-Avila; Yvonne Lamers et al. (2013). Metabolite profile analysis reveals functional effects of 28-day vitamin B-6 restriction on one-carbon metabolism and tryptophan catabolic pathways in healthy men and women. (external link)
• Lieke Bakker; Inez H. G. B. Ramakers; Martin P. J. van Boxtel et al. (2021). Associations between plasma kynurenines and cognitive function in individuals with normal glucose metabolism, prediabetes and type 2 diabetes: the Maastricht Study. (external link)
• Arve Ulvik; Marta Ebbing; Steinar Hustad et al. (2010). Long- and short-term effects of tobacco smoking on circulating concentrations of B vitamins. (external link)
• Vegard Lysne; Bodil Bjørndal; Mari Lausund Grinna et al. (2019). Short-term treatment with a peroxisome proliferator-activated receptor α agonist influences plasma one-carbon metabolites and B-vitamin status in rats. (external link)
• David C. Muller; Allison M. Hodge; Anouar Fanidi et al. (2018). No association between circulating concentrations of vitamin D and risk of lung cancer: An analysis in 20 prospective studies in the Lung Cancer Cohort Consortium (LC3). (external link)
• Manjeswori Ulak; Ram Krishna Chandyo; Andrew L. Thorne-Lyman et al. (2016). Vitamin status among breastfed infants in Bhaktapur, Nepal. (external link)
• Stine Marie Ulven; Jacob J. Christensen; Ottar Nygård et al. (2019). Using metabolic profiling and gene expression analyses to explore molecular effects of replacing saturated fat with polyunsaturated fat-a randomized controlled dietary intervention study. (external link)
• Øivind Midttun; Mary K. Townsend; Ottar Nygård et al. (2014). Most blood biomarkers related to vitamin status, one-carbon metabolism, and the kynurenine pathway show adequate preanalytical stability and within-person reproducibility to allow assessment of exposure or nutritional status in healthy women and cardiovascular patients. (external link)
• Joyce Y. Huang; Lesley M. Butler; Øivind Midttun et al. (2018). A prospective evaluation of serum kynurenine metabolites and risk of pancreatic cancer. (external link)
• Joyce Y. Huang; Hung N. Luu; Lesley M. Butler et al. (2020). A prospective evaluation of serum methionine-related metabolites in relation to pancreatic cancer risk in two prospective cohort studies. (external link)
• Mattias Johansson; Bethany Van Guelpen; Stein Emil Vollset et al. (2009). One-carbon metabolism and prostate cancer risk: prospective investigation of seven circulating B vitamins and metabolites. (external link)
• Øivind Midttun; Arve Ulvik; Ottar Nygård et al. (2018). Performance of plasma trigonelline as a marker of coffee consumption in an epidemiologic setting. (external link)
• Kamila Borowczyk; Justyna Piechocka; Rafał Głowacki et al. (2018). Urinary excretion of homocysteine thiolactone and the risk of acute myocardial infarction in coronary artery disease patients: the WENBIT trial. (external link)
• Eva Ringdal Pedersen; Nora Tuseth; Simone Eussen et al. (2015). Associations of plasma kynurenines with risk of acute myocardial infarction in patients with stable angina pectoris. (external link)
• Arve Ulvik; Eva Ringdal Pedersen; Gard Frodahl Tveitevåg Svingen et al. (2016). Vitamin B-6 catabolism and long-term mortality risk in patients with coronary artery disease. (external link)
• Elizabeth L. Cope; Martha J. Shrubsole; Sarah S. Cohen et al. (2013). Intraindividual variation in one-carbon metabolism plasma biomarkers. (external link)
• Øivind Midttun; Simon Steinar Hustad; Per Magne Ueland (2009). Quantitative profiling of biomarkers related to B-vitamin status, tryptophan metabolism and inflammation in human plasma by liquid chromatography/tandem mass spectrometry. (external link)
• Elisabet Söderström; Torbjörn K. Nilsson; Jörn Schneede et al. (2021). Plasma cotinine is positively associated with homocysteine in smokers but not in users of smokeless tobacco. (external link)
• Simone Eussen; Stein Emil Vollset; Simon Steinar Hustad et al. (2010). Plasma vitamins B2, B6, and B12, and related genetic variants as predictors of colorectal cancer risk. (external link)
• Aslaug Drotningsvik; Øivind Midttun; Linn Anja Slåke Vikøren et al. (2019). Urine and plasma concentrations of amino acids and plasma vitamin status differ, and are differently affected by salmon intake, in obese Zucker fa/fa rats with impaired kidney function and in Long-Evans rats with healthy kidneys. (external link)
• Øivind Midttun; Arve Ulvik; Eva Kristine Ringdal Pedersen et al. (2011). Low plasma vitamin B-6 status affects metabolism through the kynurenine pathway in cardiovascular patients with systemic inflammation. (external link)
• Simon Steinar Hustad; Simone Eussen; Øivind Midttun et al. (2012). Kinetic modeling of storage ffects on biomarkers related to B vitamin status and one-carbon metabolism. (external link)
• Arne Olav Ervik; Stein-Erik Hafstad Solvang; Jan Erik Nordrehaug et al. (2019). The associations between cognitive prognosis and kynurenines are modified by the apolipoprotein ε4 allele variant in patients with dementia. (external link)
• Martin Kummen; Louise B. Thingholm; Malte C. Rühlemann et al. (2020). Altered Gut Microbial Metabolism of Essential Nutrients in Primary Sclerosing Cholangitis. (external link)
• Arve Ulvik; Despoina Theofylaktopoulou; Øivind Midttun et al. (2013). Substrate product ratios of enzymes in the kynurenine pathway measured in plasma as indicators of functional vitamin B-6 status. (external link)
• Jon Sigurd Sande; Arve Ulvik; Øivind Midttun et al. (2019). Vitamin B-6 Status Correlates with Disease Activity in Rheumatoid Arthritis Patients During Treatment with TNFα Inhibitors. (external link)
• Joanna L Clasen; Alicia K. Heath; Heleen Van Puyvelde et al. (2021). A comparison of complementary measures of vitamin B6 status, function, and metabolism in the European Prospective Investigation into Cancer and Nutrition (EPIC) study. (external link)
• Ingrid Kristin Torsvik; Per Magne Ueland; Trond Markestad et al. (2015). Motor development related to duration of exclusive breastfeeding, B vitamin status and B12 supplementation in infants with a birth weight between 2000-3000 g, results from a randomized intervention trial. (external link)
• Monika Christensen; Eva Kristine Ringdal Pedersen; Yngve Nordbø et al. (2012). Vitamin B6 status and interferon-γ-mediated immune activation in primary hyperparathyroidism. (external link)
• Øivind Midttun; Simon Steinar Hustad; Jørn Schneede et al. (2007). Plasma vitamin B-6 forms and their relation to transsulfuration metabolites in a large, population-based study. (external link)
• Valéria Troncoso Baltar; Wei W. Xun; Mattias Johansson et al. (2013). A structural equation modelling approach to explore the role of B vitamins and immune markers in lung cancer risk. (external link)
• David C. Muller; Mattias Johansson; David Zaridze et al. (2015). Circulating concentrations of vitamin B6 and kidney cancer prognosis: A prospective case-cohort study. (external link)
• Hui Zuo; Ottar Nygård; Per Magne Ueland et al. (2018). Association of plasma neopterin with risk of an inpatient hospital diagnosis of atrial fibrillation: results from two prospective cohort studies. (external link)
• Per Magne Ueland; Øivind Midttun; Amrei Windelberg et al. (2007). Quantitative profiling of folate and one-carbon metabolism in large-scale epidemiological studies by mass spectrometry. (external link)
• Øivind Midttun; Despoina Theofylaktopoulou; Adrian Mccann et al. (2017). Circulating concentrations of biomarkers and metabolites related to Vitamin status, one-carbon and the kynurenine pathways in US, Nordic, Asian, and Australian populations. (external link)
• Marianne Bratlie; Ingrid Valheim Hagen; Anita Helland et al. (2020). Five salmon dinners per week were not sufficient to prevent the reduction in serum vitamin D in autumn at 60° north latitude: A randomised trial. (external link)
• Sarala Banjara; Ellen Berggreen; Jannicke Igland et al. (2025). Plasma levels of immune system activation markers Neopterin and Kynurenine-to-Tryptophan Ratio, and oral health among community-dwelling adults in Norway: a population-based, cohort study. (external link)
• Jane C. Figueiredo; A. Joan Levine; Maria V. Grau et al. (2008). Vitamins B-2, B-6, and B-12 and risk of new colorectal adenomas in a randomized trial of aspirin use and folic acid supplementation. (external link)
• Thomas Olsen; Kathrine Vinknes; Gard Frodahl Tveitevåg Svingen et al. (2018). The risk association of plasma total homocysteine with acute myocardial infarction is modified by serum vitamin A. (external link)
• M Ebbing; Kaare Harald Bønaa; E Arnesen et al. (2010). Combined analyses and extended follow-up of two randomized controlled homocysteine-lowering B-vitamin trials. (external link)
• Maria Vistnes; German Tapia; Karl Staffan Mårild et al. (2017). Plasma immunological markers in pregnancy and cord blood: A possible link between macrophage chemo-attractants and risk of childhood type 1 diabetes. (external link)
• Anne Lise Bjørke Monsen; Christine Roth; Per Magnus et al. (2013). Maternal B vitamin status in pregnancy week 18 according to reported use of folic acid supplements. (external link)
• Shu-Chun Chuang; Rachel Stolzenberg-Solomon; Per Magne Ueland et al. (2011). A U-shaped relationship between plasma folate and pancreatic cancer risk in the European Prospective Investigation into Cancer and Nutrition. (external link)
• Gary M Shaw; Susan L Carmichael; Stein Emil Vollset et al. (2009). Mid-pregnancy cotinine and risks of orofacial clefts and neural tube defects. (external link)
• Oana M. Deac; James L. Mills; Clair M. Gardiner et al. (2016). Serum immune system biomarkers neopterin and interleukin-10 are strongly related to tryptophan metabolism in healthy young adults. (external link)
• Despoina Theofylaktopoulou; Arve Ulvik; Øivind Midttun et al. (2014). Vitamins B2 and B6 as determinants of kynurenines and related markers of interferon-gamma-mediated immune activation in the community-based Hordaland health study.. (external link)
• Linn A. Vikøren; Aslaug Drotningsvik; Øivind Midttun et al. (2021). Baked cod consumption delayed the development of kidney and liver dysfunction and affected plasma amino acid concentrations, but did not affect blood pressure, blood glucose or liver triacylglycerol concentrations in obese fa/fa Zucker rats.. (external link)
• Max Leenders; Shu-Chun Chuang; Christina C. Dahm et al. (2012). Plasma cotinine levels and pancreatic cancer in the EPIC cohort study. (external link)
• Pål Ivar Holm; Per Magne Ueland; Stein Emil Vollset et al. (2005). Betaine and folate status as cooperative determinants of plasma homocysteine in humans. (external link)
• Øivind Midttun; Per Magne Ueland (2011). Determination of vitamins A, D and E in a small volume of human plasma by a high-throughput method based on liquid chromatography/tandem mass spectrometry. (external link)
• Anouar Fanidi; David C. Muller; Øivind Midttun et al. (2016). Circulating Vitamin D in relation to cancer incidence and survival of the head and neck and oesophagus in the EPIC cohort. (external link)
• Hui Zuo; Grethe Seppola Tell; Stein Emil Vollset et al. (2014). Interferon-γ-induced inflammatory markers and the risk of cancer: The Hordaland Health Study. (external link)
• Midttun Bjørn Øivind; Simon Steinar Hustad; Einar Solheim et al. (2005). Multianalyte quantification of vitamin B-6 and B-2 species in the nanomolar range in human plasma by liquid chromatography - Tandem mass spectrometry. (external link)
• Anita Helland; Marianne Bratlie; Ingrid Valheim Hagen et al. (2021). Effect of high intake of cod or salmon on serum total neopterin concentration: a randomised clinical trial. (external link)
• Barbara N. DeRatt; Maria A. Ralat; Vegard Lysne et al. (2017). Metabolomic evaluation of the consequences of plasma cystathionine elevation in adults with stable angina pectoris. (external link)
• Espen Øglænd Bjørnestad; Robert Andre Borsholm; Gard Frodahl Tveitevåg Svingen et al. (2017). Neopterin as an effect modifier of the cardiovascular risk predicted by total homocysteine: A prospective 2-cohort study. (external link)
• Liv Grimstvedt Kvalvik; Roy Miodini Nilsen; Rolv Skjaerven et al. (2012). Self-reported smoking status and plasma cotinine concentrations among pregnant women in the Norwegian Mother and Child Cohort Study. (external link)
• Maria Christine Magnus; German Tapia; Sjurdur Frodi Olsen et al. (2018). Parental smoking and risk of childhood-onset type 1 diabetes. (external link)
• Maria Vollsæter; Thomas Halvorsen; Trond Markestad et al. (2018). Renal function and blood pressure in 11 year old children born extremely preterm or small for gestational age. (external link)
• Anders Lund; Jan Erik Nordrehaug; Grete Slettom et al. (2020). Plasma kynurenines and prognosis in patients with heart failure. (external link)
• Vegard Lysne; Elin Strand; Gard Frodahl Tveitevåg Svingen et al. (2016). Peroxisome Proliferator-Activated Receptor Activation is Associated with Altered Plasma One-Carbon Metabolites and B-Vitamin Status in Rats. (external link)
• Øistein Mjelva; Gard Frodahl Tveitevåg Svingen; Eva Ringdal Pedersen et al. (2018). Fibrinogen and Neopterin Is Associated with Future Myocardial Infarction and Total Mortality in Patients with Stable Coronary Artery Disease. (external link)
• Ninna Drivsholm; Andreas Knudsen; Maria Faurholt-Jepsen et al. (2021). Alterations in the Kynurenine Pathway of Tryptophan Metabolism Are Associated With Depression in People Living With HIV. (external link)
• Eli Skeie; Elin Strand; Eva Ringdal Pedersen et al. (2015). Circulating B-vitamins and smoking habits are associated with serum polyunsaturated fatty acids in patients with suspected coronary heart disease: A cross-sectional study. (external link)
• Sarah E Reese; Shanshan Zhao; Michael C Wu et al. (2016). DNA methylation score as a biomarker in newborns for sustained maternal smoking during pregnancy. (external link)
• Mattias Johansson; Caroline Relton; Per Magne Ueland et al. (2010). Serum B vitamin levels and risk of lung cancer. (external link)
• Jannike Øyen; Clara Gram Gjesdal; Ottar Nygård et al. (2014). Smoking and body fat mass in relation to bone mineral density and hip fracture: The Hordaland Health Study. (external link)
• Tonia C. Carter; Faith Pangilinan; Anne M. Molloy et al. (2015). Common variants at putative regulatory sites of the tissue nonspecific alkaline phosphatase gene influence circulating pyridoxal 5'-phosphate concentration in healthy adults. (external link)
• Daniel Dahlberg; Eduard A. Struys; EE Janssen et al. (2017). Cyst Fluid From Cystic, Malignant Brain Tumors: A Reservoir of Nutrients, Including Growth Factor-Like Nutrients, for Tumor Cells.. (external link)
• Sherly X. Li; Allison M. Hodge; Robert J. MacInnis et al. (2021). Inflammation-related marker profiling of dietary patterns and all-cause mortality in the melbourne collaborative cohort study. (external link)
• David C. Muller; Ghislaine Scelo; David Zaridze et al. (2015). Circulating 25-hydroxyvitamin D3 and survival after diagnosis with kidney cancer. (external link)
• Audun Skjærseth Hildre; Stein-Erik Hafstad Solvang; Dag Aarsland et al. (2020). Components of the choline oxidation pathway modify the association between the apolipoprotein ε4 gene variant and cognitive decline in patients with dementia. (external link)
• Arve Ulvik; Øivind Midttun; Adrian McCann et al. (2019). Tryptophan catabolites as metabolic markers of vitamin B-6 status evaluated in cohorts of healthy adults and cardiovascular patients. (external link)
• Anita Herrstedt; Marie L Bay; Casper Simonsen et al. (2018). Exercise-mediated improvement of depression in patients with gastro-esophageal junction cancer is linked to kynurenine metabolism. (external link)
• Stein-Erik Hafstad Solvang; Jan Erik Nordrehaug; Grethe S. Tell et al. (2019). The kynurenine pathway and cognitive performance in community-dwelling older adults. The Hordaland Health Study. (external link)
• Stein-Erik Hafstad Solvang; Jan Erik Nordrehaug; Dag Aarsland et al. (2019). Kynurenines, Neuropsychiatric Symptoms, and Cognitive Prognosis in Patients with Mild Dementia. (external link)
• Pedram Paragomi; Renwei Wang; Joyce Y. Huang et al. (2023). The Association between Serum Riboflavin and Flavin Mononucleotide with Pancreatic Cancer: Findings from a Prospective Cohort Study. (external link)
• Øivind Midttun; Arve Ulvik; Klaus Meyer et al. (2023). A cross-sectional study of inflammatory markers as determinants of circulating kynurenines in the Lung Cancer Cohort Consortium. (external link)
• Eva Kristine Ringdal Pedersen; Øivind Midttun; Per Magne Ueland et al. (2011). Systemic Markers of Interferon-gamma-Mediated Immune Activation and Long-Term Prognosis in Patients With Stable Coronary Artery Disease. (external link)
• Yiyang Yue; Jordan H. Creed; David J. Cote et al. (2021). Pre-diagnostic circulating concentrations of fat-soluble vitamins and risk of glioma in three cohort studies. (external link)
• Håvard Bjørke Jenssen; Ingrid Kristin Torsvik; Per Magne Ueland et al. (2013). Biochemical signs of impaired cobalamin function do not affect hematological parameters in young infants: results from a double-blind randomized controlled trial. (external link)
• Joyce Y. Huang; Lesley M. Butler; Øivind Midttun et al. (2016). Serum B6 vitamers (pyridoxal 5′-phosphate, pyridoxal, and 4-pyridoxic acid) and pancreatic cancer risk: two nested case–control studies in Asian populations. (external link)
• Else Quist-Paulsen; Pål Aukrust; Anne-Marte Bakken Kran et al. (2018). High neopterin and IP-10 levels in cerebrospinal fluid are associated with neurotoxic tryptophan metabolites in acute central nervous system infections. (external link)
• Leandro Z. Agudelo; Duarte M.S. Ferreira; Igor Cervenka et al. (2018). Kynurenic Acid and Gpr35 Regulate Adipose Tissue Energy Homeostasis and Inflammation. (external link)
• Eirik Degerud; Ottar Nygård; Stefan De Vogel et al. (2018). Plasma 25-hydroxyvitamin D and mortality in patients with suspected stable angina pectoris. (external link)
• Arve Ulvik; Øivind Midttun; Eva Kristine Ringdal Pedersen et al. (2012). Association of plasma B-6 vitamers with systemic markers of inflammation before and after pyridoxine treatment in patients with stable angina pectoris. (external link)
• Julie K. Bassett; Maree T. Brinkman; Pierre-Antoine Dugué et al. (2018). Circulating concentrations of B group vitamins and urothelial cell carcinoma. (external link)
• Hung N. Luu; Pedram Paragomi; Renwei Wang et al. (2022). The Association between Serum Serine and Glycine and Related-Metabolites with Pancreatic Cancer in a Prospective Cohort Study. (external link)
• David C. Muller; Tricia L Larose; Allison Hodge et al. (2019). Circulating high sensitivity C reactive protein concentrations and risk of lung cancer: Nested case-control study within Lung Cancer Cohort Consortium. (external link)
• Eirik Wilberg Rebnord; Elin Strand; Øivind Midttun et al. (2017). The kynurenine:tryptophan ratio as a predictor of incident type 2 diabetes mellitus in individuals with coronary artery disease. (external link)
• Stefan De Vogel; Jörn Schneede; Per Magne Ueland et al. (2011). Biomarkers related to one-carbon metabolism as potential risk factors for distal colorectal adenomas. (external link)
• Ingrid Kvestad; Mari Hysing; Merina Shrestha et al. (2017). Vitamin B-12 status in infancy is positively associated with development and cognitive functioning 5 y later in Nepalese children. (external link)
• Karl Staffan Mårild; German Tapia; Øivind Midttun et al. (2019). Smoking in pregnancy, cord blood cotinine and risk of celiac disease diagnosis in offspring. (external link)
• Despoina Theofylaktopoulou; Øivind Midttun; Arve Ulvik et al. (2013). A community-based study on determinants of circulating markers of cellular immune activation and kynurenines: the Hordaland Health Study. (external link)
• Despoina Theofylaktopoulou; Øivind Midttun; Per Magne Ueland et al. (2018). Impaired functional vitamin B6 status is associated with increased risk of lung cancer. (external link)
• Indu Dhar; Sumia Siddique; Eva Kristine Ringdal Pedersen et al. (2020). Lipid parameters and vitamin A modify cardiovascular risk prediction by plasma neopterin. (external link)
• Thomas Olsen; Kathrine Vinknes; Rune Blomhoff et al. (2019). Creatinine, total cysteine and uric acid are associated with serum retinol in patients with cardiovascular disease. (external link)
• Lovisa Widbom; Jørn Schneede; Øivind Midttun et al. (2020). Elevated plasma cotinine is associated with an increased risk of developing IBD, especially among users of combusted tobacco. (external link)
• Luisa Rios-Avila; Bonnie Coats; Maria Ralat et al. (2015). Pyridoxine supplementation does not alter in vivo kinetics of one-carbon metabolism but modifies patterns of one-carbon and tryptophan metabolites in Vitamin B-6-insufficient oral contraceptive users. (external link)
• Julie C. Gaardbo; Marius Trøseid; Birgitte Stiksrud et al. (2015). Increased tryptophan catabolism is associated with depletion of Tc17/MAIT cells, and lower CD4 cell count in HIV-1 infected patients on cART after two years of follow-up. (external link)
• Claire E. Thomas; Renwei Wang; Jennifer Adams-Haduch et al. (2020). Urinary cotinine is as good a biomarker as serum cotinine for cigarette smoking exposure and lung cancer risk prediction. (external link)
• Giil Lasse Melvær; Øivind Midttun; Helga Refsum et al. (2017). Kynurenine pathway metabolites in Alzheimer's disease. (external link)
• Luisa Rios-Avila; Bonnie Coats; Yueh-Yun Chi et al. (2015). Metabolite profile analysis reveals association of vitamin B-6 with metabolites related to one-carbon metabolism and tryptophan catabolism but notwith biomarkers of inflammation in oral contraceptive users and reveals the effects of oral contraceptives on these processes. (external link)
• Oana M. Deac; James L. Mills; Barry Shane et al. (2015). Tryptophan catabolism and vitamin B-6 status are affected by gender and lifestyle factors in healthy young adults. (external link)
• Aslaug Drotningsvik; Øivind Midttun; Adrian Mccann et al. (2018). Dietary intake of cod protein beneficially affects concentrations of urinary markers of kidney function and results in lower urinary loss of amino acids in obese Zucker fa/fa rats. (external link)
• David C Muller; Anouar Fanidi; Øivind Midttun et al. (2014). Circulating 25-hydroxyvitamin D3 in relation to renal cell carcinoma incidence and survival in the EPIC cohort. (external link)
• M Gelpi; Beate Vestad; Sajan Raju et al. (2022). Association of the Kynurenine Pathway of Tryptophan Metabolism with Human Immunodeficiency Virus-Related Gut Microbiota Alterations and Visceral Adipose Tissue Accumulation. (external link)
• Joyce Yongxu Huang; Tricia L Larose; Hung N. Luu et al. (2019). Circulating markers of cellular immune activation in pre-diagnostic blood sample and lung cancer risk in the Lung Cancer Cohort Consortium (LC3). (external link)
• Monika Christensen; Dag Jone Stokke Fadnes; Therese Halvorsen Røst et al. (2018). Inflammatory markers, the tryptophan-kynurenine pathway, and Vitamin B status after bariatric surgery. (external link)
• Anouar Fanidi; Caroline Relton; Per Magne Ueland et al. (2014). A prospective study of one-carbon metabolism biomarkers and cancer of the head and neck and esophagus. (external link)
• Claudine M. Samanic; Yiyang Yue; David J. Cote et al. (2022). A prospective study of pre-diagnostic circulating tryptophan and kynurenine, and the kynurenine/tryptophan ratio and risk of glioma. (external link)
• Shu-Chun Chuang; Heiner Boeing; Stein Emil Vollset et al. (2016). Cellular immune activity biomarker neopterin is associated hyperlipidemia: results from a large population-based study. (external link)
• Hui Zuo; Per Magne Ueland; Arve Ulvik et al. (2016). Plasma Biomarkers of Inflammation, the Kynurenine Pathway, and Risks of All-Cause, Cancer, and Cardiovascular Disease Mortality: The Hordaland Health Study. (external link)
• Simon Steinar Hustad; Øivind Midttun; Jørn Schneede et al. (2007). The methylenetetrahydrofolate reductase 677C -> T polymorphism as a modulator of a B vitamin network with major effects on homocysteine metabolism. (external link)
• Marianne Bratlie; Ingrid Valheim Hagen; Anita Helland et al. (2020). Effects of high intake of cod or salmon on gut microbiota profile, faecal output and serum concentrations of lipids and bile acids in overweight adults: a randomised clinical trial. (external link)
• Shu-Chun Chuang; Anouar Fanidi; Per Magne Ueland et al. (2014). Circulating biomarkers of tryptophan and the kynurenine pathway and lung cancer risk. (external link)
• Eva Kristine Ringdal Pedersen; Øivind Midttun; Per Magne Ueland et al. (2010). Systemic Markers of Interferon-–Mediated Immune Activation and Long-Term Prognosis in Patients With Stable Coronary Artery Disease. (external link)
• Simone Eussen; Per Magne Ueland; Stein Emil Vollset et al. (2015). Kynurenines as predictors of acute coronary events in the Hordaland Health Study. (external link)

Letter to the editor

• Karl Mårild; Maria Vistnes; German Tapia et al. (2017). Midpregnancy and cord blood immunologic biomarkers, HLA genotype, and pediatric celiac disease. (external link)

Conference poster

• Eva Ringdal Pedersen; Nora Tuseth; Simone Eussen et al. (2014). Associations of plasma kynurenines with risk of acute myocardial infarction in patients with stable angina pectoris. (external link)
• Øivind Midttun; Eva Kristine Ringdal Pedersen; Arve Ulvik et al. (2010). Inflammation suggest plasma concentration of 3-hydroxykynurenine as a metabolic marker of vitamin B6 status. (external link)
• Stine Marie Ulven; Jacob J. Christensen; Ottar Nygård et al. (2018). Using metabolic profiling to explore molecular effects of replacing saturated fat with polyunsaturated fat- a randomized controlled dietary intervention study. (external link)
• Eva Kristine Ringdal Pedersen; Marta Ebbing; Øivind Midttun et al. (2007). B6 vitamers as predictors of mortality in patients with stable chest pain. (external link)
• Hui Zuo; Grethe S. Tell; Per Magne Ueland et al. (2017). Vitamin B6-related biomarkers and long-term stroke risk: the Hordaland Health Study. (external link)
• Hui Zuo; Per Magne Ueland; Simone Eussen et al. (2014). Markers of vitamin B6 status and metabolism as predictors of incident cancer: A community-based cohort study. (external link)

Conference lecture

• Øivind Midttun; Simon Steinar Hustad; Per Magne Ueland (2007). A high-throughput method for quantification of riboflavin, vitamin B6 forms, related metabolites and inflammation markers in human plasma by HPLC-MS/MS. (external link)
• Eva Kristine Ringdal Pedersen; Per Magne Ueland; Stein Emil Vollset et al. (2007). Total homocysteine, systemic markers of inflammation and long-term mortality in patients with stable angina. (external link)
• Stine Marie Ulven; Jacob J. Christensen; Ottar Nygård et al. (2018). Using metabolic profiling to explore molecular effects of replacing saturated fat with polyunsaturated fat- a randomized controlled dietary intervention study. (external link)

Academic literature review

• Per Magne Ueland; Arve Ulvik; Luisa Rios-Avila et al. (2015). Direct and functional biomarkers of vitamin B6 status. (external link)
• Per Magne Ueland; Adrian Mccann; Øivind Midttun et al. (2017). Inflammation, vitamin B6 and related pathways. (external link)
• Per Magne Ueland; Øivind Midttun; Amrei Windelberg et al. (2007). Review: Quantitative profiling of folate and one-carbon metabolism in large-scale epidemiological studies by mass spectrometry. (external link)

Conference abstract

• Eva Kristine Ringdal Pedersen; Marta Ebbing; Øivind Midttun et al. (2008). B6 vitamers and long term mortality in patients with stable angina. (external link)
• Eva Kristine Ringdal Pedersen; Per Magne Ueland; Stein Emil Vollset et al. (2008). Homocysteine and markers of immune activation as predictors of mortality in stable angina patients. (external link)

See a complete overview of publications in NVA.