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Michael Grahn

Explore the profile of Michael Grahn including associated specialties, affiliations and a list of published articles. Areas
Snapshot
Articles 13
Citations 71
Followers 0
Related Specialties
Nutritional Sciences
Pediatrics
Physiology
Top 10 Co-Authors
Sherry A Tanumihardjo
Christopher R Davis
Bryan M Gannon
Olivier O Sombie
Augustin N Zeba
Muhammad A Dhansay
Martha E van Stuijvenberg
Jesse Sheftel
Stefaan de Henauw
Chisela Kaliwile
Published In
J Nutr
Am J Clin Nutr
Am J Physiol Regul Integr Comp Physiol
Eur J Nutr
Nutrients
Affiliations
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Recent Articles
1.
Vitamin D Maintains Growth and Bone Mineral Density against a Background of Severe Vitamin A Deficiency and Moderate Toxicity in a Swine Model
Phiri C, Davis C, Grahn M, Gannon B, Kokinos B, Crenshaw T, et al.
Nutrients . 2024 Jul; 16(13). PMID: 38999785
Excessive vitamin A (VA) negatively impacts bone. Interactions between VA and vitamin D (VD) in bone health are not well-understood. This study used a traditional two-by-two factorial design. Pigs were...
2.
A comparative study on indicators of vitamin A status and risk factors for sensitivity and specificity of the methods to detect vitamin A deficiency
Sombie O, Zeba A, Some J, Kazienga A, Grahn M, Tanumihardjo S, et al.
Nutr Metab (Lond) . 2023 Nov; 20(1):49. PMID: 37974246
Background: Serum retinol (SR) and retinol-binding protein (RBP) are commonly used indicators, but they are affected by infections and inflammation. This study aimed to assess the sensitivity and specificity of...
3.
Hepatic Vitamin A Concentrations and Association with Infectious Causes of Child Death
Gupta P, Madewell Z, Gannon B, Grahn M, Akelo V, Onyango D, et al.
J Pediatr . 2023 Nov; 265:113816. PMID: 37931699
Objectives: To assess postmortem vitamin A (VA) concentrations in children under 5 years of age and evaluate the association between VA deficiency (VAD) and infectious causes of death (CoD). Study...
4.
Dietary intake of preformed vitamin A and provitamin A carotenoids are not associated with serum retinol and carotenoid concentrations among children 36-59 months of age in rural Burkina Faso: a cross-sectional study
Sombie O, Zeba A, Some J, Kazienga A, Diendere J, Bationo J, et al.
Eur J Nutr . 2023 Aug; 62(8):3311-3327. PMID: 37589896
Purpose: This study aimed to assess the association between dietary intake of preformed vitamin A (VA) and pro-VA carotenoids and serum retinol and carotenoid concentrations among 36-59-month-old children in a...
5.
Association between Biomarkers of Inflammation and Total Liver Vitamin A Reserves Estimated by C-Retinol Isotope Dilution among Preschool Children in 5 African Countries
Suri D, Sombie O, Zeba A, Medoua Nama G, Bekele T, Woldeyohannes M, et al.
J Nutr . 2023 Mar; 153(3):622-635. PMID: 36931745
Background: Vitamin A (VA) assessment is important for targeting public health programs. Retinol isotope dilution (RID) is a sensitive method to estimate total body VA stores (TBSs) and total liver...
6.
Comparison of Total Body Vitamin A Stores Using Individual versus Population C-Natural Abundance of Serum Retinol in Preschool Children and Women Residing in 6 Diverse African Countries
Gannon B, Sombie O, Zeba A, Medoua Nama G, Bekele T, Woldeyohannes M, et al.
J Nutr . 2023 Feb; 153(4):949-957. PMID: 36822237
Background: Stable isotope techniques using C to assess vitamin A (VA) dietary sources, absorption, and total body VA stores (TBSs) require determination of baseline C abundance. C-natural abundance is approximately...
7.
Chronic and acute hypervitaminosis A are associated with suboptimal anthropometric measurements in a cohort of South African preschool children
Sheftel J, van Stuijvenberg M, Dhansay M, Suri D, Grahn M, Keuler N, et al.
Am J Clin Nutr . 2022 Jan; 115(4):1059-1068. PMID: 35030234
Background: Excessive vitamin A (VA) can cause bone resorption and impair growth. Government-mandated VA supplementation (VAS) and adequate intake through dietary fortification and liver consumption led to excessive VA in...
8.
Breast Milk-Derived Retinol Is a Potential Surrogate for Serum in the 13C-Retinol Isotope Dilution Test in Zambian Lactating Women with Vitamin A Deficient and Adequate Status
Kaliwile C, Michelo C, Sheftel J, Davis C, Grahn M, Bwembya P, et al.
J Nutr . 2020 Nov; 151(1):255-263. PMID: 33245109
Background: Vitamin A (VA) deficiency (VAD) affects ∼19 million pregnant women worldwide. The extent of VAD in Zambian women of reproductive age is unknown owing to lack of survey inclusion...
9.
Overlapping Vitamin A Interventions with Provitamin A Carotenoids and Preformed Vitamin A Cause Excessive Liver Retinol Stores in Male Mongolian Gerbils
Sowa M, Mourao L, Sheftel J, Kaeppler M, Simons G, Grahn M, et al.
J Nutr . 2020 May; 150(11):2912-2923. PMID: 32455433
Background: Vitamin A (VA) deficiency is a public health problem in some countries. Fortification, supplementation, and increased provitamin A consumption through biofortification are efficacious, but monitoring is needed due to...
10.
South African preschool children habitually consuming sheep liver and exposed to vitamin A supplementation and fortification have hypervitaminotic A liver stores: a cohort study
van Stuijvenberg M, Dhansay M, Nel J, Suri D, Grahn M, Davis C, et al.
Am J Clin Nutr . 2019 May; 110(1):91-101. PMID: 31089689
Background: In some regions, multiple vitamin A (VA) interventions occur in the same target groups, which may lead to excessive stores. Retinol isotope dilution (RID) is a more sensitive technique...