Consumption of a calcium and vitamin D-fortified food product does not affect iron status during initial military training: a randomised, double-blind, placebo-controlled trial

Ca/vitamin D supplementation maintains bone health and decreases stress fracture risk during initial military training (IMT); however, there is evidence that Ca may negatively affect the absorption of other critical micronutrients, particularly Fe. The objective of this randomised, double-blind, pla...

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Bibliographic Details
Published in:British journal of nutrition 2016-02, Vol.115 (4), p.637-643
Main Authors: Hennigar, Stephen R., Gaffney-Stomberg, Erin, Lutz, Laura J., Cable, Sonya J., Pasiakos, Stefan M., Young, Andrew J., McClung, James P.
Format: Article
Language:English
Subjects:
Adolescent
Adult
Anemia, Iron-Deficiency - blood
Anemia, Iron-Deficiency - etiology
Biomarkers - blood
Calcium
Calcium, Dietary - adverse effects
Calcium, Dietary - therapeutic use
Clinical trials
Dietary supplements
Double-Blind Method
Female
Food, Fortified - adverse effects
Fortified foods
Fractures, Stress - epidemiology
Fractures, Stress - prevention & control
Human and Clinical Nutrition
Humans
Iron
Iron, Dietary - antagonists & inhibitors
Iron, Dietary - metabolism
Male
Micronutrients
Military
Military Personnel - education
Military training
Nutrition
Nutritional Status
Oklahoma - epidemiology
Physical Conditioning, Human - adverse effects
Risk Factors
Snacks
Stress, Physiological
Vitamin D
Vitamin D - adverse effects
Vitamin D - therapeutic use
Young Adult
Young adults
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Summary:Ca/vitamin D supplementation maintains bone health and decreases stress fracture risk during initial military training (IMT); however, there is evidence that Ca may negatively affect the absorption of other critical micronutrients, particularly Fe. The objective of this randomised, double-blind, placebo-controlled trial was to determine whether providing 2000 mg/d Ca and 25µg/d vitamin D in a fortified food product during 9 weeks of military training affects Fe status in young adults. Male (n 98) and female (n 54) volunteers enrolled in US Army basic combat training (BCT) were randomised to receive a snack bar with Ca/vitamin D (n 75) or placebo (snack bar without Ca/vitamin D; n 77) and were instructed to consume 2 snack bars/d between meals throughout the training course. Circulating ionised Ca was higher (P
ISSN:0007-1145
1475-2662
DOI:10.1017/S0007114515004766