International Journal for Vitamin and Nutrition Research (IJVNR) is published by IMR Press from Volume 95 Issue 1 (2025). Previous articles were published by another publisher under a hybrid publishing model, and they are hosted by IMR Press on imrpress.com as a courtesy and upon agreement with Hogrefe.
1 Department of Home Economics and Human Nutrition, Lilongwe University of Agriculture and Natural Resources, Bunda College Campus, Lilongwe, Malawi
2 Department of Nutrition, Norwich Medical School, University of East Anglia, Norwich, UK
3 School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, UK
4 Ministry of Agriculture, Irrigation and Water Development, Department of Agricultural Research Services, Lunyangwa Research Station, Mzuzu, Malawi
5 British Geological Survey, Keyworth, Nottingham, UK
6 Community Health Sciences Unit, Ministry of Health, Lilongwe, Malawi
7 Community Health Sciences Unit, Ministry of Health, Lilongwe, Malawi
8 Department of Human Nutrition, University of Otago, Dunedin, New Zealand
Abstract
Background: Zinc deficiency is often associated with nutritional iron deficiency (ID), and may be exacerbated by low selenium status. Aim: To investigate risk of iron and zinc deficiency in women with contrasting selenium status. Methods: In a cross-sectional study, 1-day diet composites and blood samples were collected from self-selected Malawian women aged 18−50 years from low- (Zombwe) (n=60) and high-plant-available soil selenium (Mikalango) (n=60) districts. Diets were analyzed for trace elements and blood for biomarkers. Results: Zinc deficiency (>90 %) was greater than ID anemia (6 %), or ID (5 %), attributed to diets low in zinc (median 5.7 mg/day) with high phytate:zinc molar ratios (20.0), but high in iron (21.0 mg/day) from soil contaminant iron. Zombwe compared to Mikalango women had lower (p<0.05) intakes of selenium (6.5 vs. 55.3 µg/day), zinc (4.8 vs. 6.4 mg/day), iron (16.6 vs. 29.6 mg/day), lower plasma selenium (0.72 vs. 1.60 µmol/L), and higher body iron (5.3 vs. 3.8 mg/kg), although plasma zinc was similar (8.60 vs. 8.87 µmol/L). Body iron and plasma zinc were positive determinants of hemoglobin. Conclusion: Risk of zinc deficiency was higher than ID and was shown not to be associated with selenium status. Plasma zinc was almost as important as body iron as a hemoglobin determinant.
Keywords
- Malawi
- Se status
- anemia
- body iron
- diet composites
- plasma Zn
- women
