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American Journal of Clinical Nutrition, Vol 25, 518-530, Copyright © 1972 by The American Society for Clinical Nutrition, Inc.

The human requirement of calcium: should low intakes be supplemented?

Alexander R. P. Walker D.Sc.1

1 From the South African Medical Research Council, Human Biochemistry Research Unit, South African Institute for Medical Research, Johannesburg, South Africa

In South Africa, enrichment of staple cereals is under consideration. In view of the known low calcium intake of three-quarters or more of the total population, a decision is required on what priority, if any, should be given to calcium supplementation.

An examination has therefore been made of body processes and disease conditions likely to be prejudiced by a low calcium intake, namely, 1) growth, pregnancy and lactation; 2) bone composition and dimensions; 3) dental caries, rickets, osteomalacia and osteoporosis, and 4) nonskeletal processes. The conclusion is reached that there is no unequivocal evidence that an habitually low intake of calcium is deleterious to man, or that an increase in calcium intake would result in clinically detectable benefits.




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