Calcium and iron absorption: mechanism of action and nutritional importance

Article Abstract:

A study on the inhibitory effect of calcium on iron absorption shows that inhibition does not occur in the gastrointestinal tract. The impairment of such iron-absorption processes suggests that the effect occurs in the mucosal cell itself. The presence of calcium-iron-phytate binding is not enough to implicate phytate in the inhibition process since iron is inhibited by calcium even in the absence of phytate. The practical nutritional implications of this process is that calcium-rich foods cannot be taken together with main meals since this decreases iron absorption by 50-60%.

Iron in the body, Iron (Nutrient), Nutrient interactions, Calcium, Dietary

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Effect of a mild infection on serum ferritin concentration - clinical and epidemiological implications

Article Abstract:

A study was conducted to examine the effect of a preceding mild infection on serum ferritin values by comparing the distribution of serum ferritin in those with and without a preceding infection in the last month. Results revealed that the prevalence of a recent infection is important in evaluating the prevalence of iron deficiency on the basis of serum ferritin measurements and in determining relationships between iron status and composition of the diet. The differences in prevalence of iron deficiency may be attributed to differences in prevalence of respiratory infections.

Ferritin, Respiratory insufficiency, Iron deficiency diseases

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Seasonal variations in vitamin D status and calcium absorption do not influence bone turnover in young women

Article Abstract:

A study examining whether seasonal variations in vitamin D and calcium absorption affects bone mineral loss in young women. The study also seeks to determine the beneficial effects of taking vitamin D supplements during wintertime. Results show that reduced vitamin D and calcium levels contribute to bone turnover in young women. Vitamin D supplements are not needed by young women if their daily calcium and phosphorus intake is greater than 1200 milligrams.

Health aspects, Young women, Food and nutrition, Vitamin D, Calcium in the body

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