The effect of long-term calcium supplementation on indices of iron, zinc and magnesium status in lactating Gambian women

Liya Yan, Ann Prentice, Bakary Dibba, Landing M. Jarjou, Dorothy M. Stirling, Susan Fairweather-Tait

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The effect of long-term supplementation with CaCO3 on indices of Fe, Zn and Mg status was investigated in a randomized, double-blind intervention study of sixty lactating Gambian women. The supplement contained 1000 mg Ca and was consumed between meals 5 d/week, for 1 year starting 1.5 weeks postpartum. Compliance was 100%. Plasma ferritin concentration, plasma Zn concentration and urinary Mg output were measured before, during and after supplementation at 1.5, 13, 52 and 78 weeks postpartum. No significant differences in mineral status were observed at any time between women in the supplement and placebo groups. Analysis of the longitudinal data series showed that plasma ferritin and Mg excretion were characteristic of the individual (P
Original languageEnglish
Pages (from-to)821-831
Number of pages11
JournalBritish Journal of Nutrition
Issue number6
Publication statusPublished - Dec 1996


  • Adolescent
  • Adult
  • Calcium
  • Double-Blind Method
  • England
  • Female
  • Ferritins
  • Food, Fortified
  • Gambia
  • Humans
  • Lactation
  • Magnesium
  • Metals
  • Nutritional Status
  • Zinc

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