Browsing SIHF Open Archive by Author "Ueland, Per Magne"
Now showing items 1-9 of 9
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Assessment of vitamin B6 status in never-pregnant, pregnant and postpartum women and their infants
Monsen, Anne-Lise Bjørke; Varsi, Kristin; Sakkestad, Sunniva Todnem; Ulvik, Arve; Ueland, Per Magne (Peer reviewed; Journal article, 2022)Purpose: Pyridoxal 5´-phosphate (PLP) is the main form of vitamin B6 in humans and functions a coenzyme for more than 160 different enzymatic reactions. The purpose of the study was to find plasma PLP concentrations, which ... -
Breastfeeding and biomarkers of folate and cobalamin status in Norwegian infants: a cross-sectional study
Solvik, Beate Stokke; Bakken, Kjersti Sletten; McCann, Adrian; Ueland, Per Magne; Henjum, Sigrun; Strand, Tor Arne (Peer reviewed; Journal article, 2024)Folate and vitamin B12 (cobalamin) are essential for growth and development. This cross-sectional study aims to describe folate and vitamin B12 status according to infant age and breastfeeding practices in Norwegian infants. ... -
Dietary Intake and Biomarkers of Folate and Cobalamin Status in Norwegian Preschool Children: The FINS-KIDS Study
Solvik, Beate Stokke; Strand, Tor A; Kvestad, Ingrid; Markhus, Maria Wik; Ueland, Per Magne; McCann, Adrian; Øyen, Jannike (Peer reviewed; Journal article, 2020)Background: Folate and cobalamin (vitamin B-12) are essential for growth and development. However, few populationbased studies have investigated B-vitamin status in children. Objectives: This study aimed to assess biomarkers ... -
Effects of vitamin B12 supplementation on neurodevelopment and growth in Nepalese Infants: A randomized controlled trial
Strand, Tor A; Ulak Chandyo, Manjeswori; Hysing, Mari; Ranjitkar, Suman; Kvestad, Ingrid; Shrestha, Merina; Ueland, Per Magne; McCann, Adrian; Shrestha, Prakash S; Shrestha, Laxman P.; Chandyo, Ram K. (Peer reviewed; Journal article, 2020)Background: Vitamin B12 deficiency is common and affects cell division and differentiation, erythropoiesis, and the central nervous system. Several observational studies have demonstrated associations between biomarkers ... -
Lower levels of the neuroprotective tryptophan metabolite, kynurenic acid, in users of estrogen contraceptives
Monsen, Anne-Lise Bjørke; Varsi, Kristin; Sakkestad, Sunniva Todnem; Ulvik, Arve; Ebbing, Cathrine; Ueland, Per Magne (Peer reviewed; Journal article, 2023)Changes in kynurenine metabolites are reported in users of estrogen containing contraception. We have assessed kynurenines, vitamin B6, vitamin B2 and the inflammation markers, C-reactive protein (CRP) and neopterin, in ... -
Maternal and infant vitamin B12 status during infancy predict linear growth at 5 years
Strand, Tor A; Ulak, Manjeswori; Kvestad, Ingrid; Henjum, Sigrun; Ulvik, Arve; Shrestha, Merina; Thorne-Lyman, Andrew L; Ueland, Per Magne; Shrestha, Prakash Sunder; Chandyo, Ram Krishna (Peer reviewed; Journal article, 2018)BACKGROUND: Many children worldwide have poor vitamin B12 status. The objective of this study was to estimate association between maternal and infant vitamin B12 status and long-term growth. METHODS: We randomly ... -
The effect of vitamin B12 supplementation during pregnancy on infant growth and development in Nepal: a community-based, double-blind, randomised, placebo-controlled trial
Chandyo, Ram K.; Kvestad, Ingrid; Ulak Chandyo, Manjeswori; Ranjitkar, Suman; Hysing, Mari; Shrestha, Merina; Schwinger, Catherine; McCann, Adrian; Ueland, Per Magne; Basnet, Sudha; Shrestha, Laxman; Strand, Tor Arne (Peer reviewed; Journal article, 2023)Background: Vitamin B12 is required for healthy infant growth and development, but low and marginal vitamin B12 status is endemic in low-income and middle-income countries. We aimed to measure the effect of vitamin B12 ... -
A Vegetarian Diet Significantly Changes Plasma Kynurenine Concentrations
Monsen, Anne-Lise Bjørke; Varsi, Kristin; Ulvik, Arve; Sakkestad, Sunniva Todnem; Ueland, Per Magne (Peer reviewed; Journal article, 2023)Tryptophan is an essential amino acid and a precursor of a number of physiologically important metabolites, including serotonin, melatonin, tryptamine, and kynurenines. We assessed tryptophan, kynurenines, and vitamin B2 ... -
Vitamin status among breastfed infants in Bhaktapur, Nepal
Ulak, Manjeswori; Chandyo, Ram Krishna; Thorne-Lyman, Andrew L.; Henjum, Sigrun; Ueland, Per Magne; Midttun, Øivind; Shrestha, Prakash S.; Fawzi, Wafaie W.; Graybill, Lauren; Strand, Tor A (Journal article; Peer reviewed, 2016)Vitamin deficiencies are known to be common among infants residing in low- and middle-income countries but relatively few studies have assessed several biochemical parameters simultaneously. The objective of the study was ...