Cochrane review of calcium supplementation, which is a routine recommendation
by most physicians, especially for women, shows that it may do more harm than
good. The number needed to treat to
prevent one fracture was 302 and the number needed to treat to cause one major
cardiovascular event was 178. However,
the obvious problem with treatment was not discussed. Everywhere in the body, calcium interacts
with magnesium. If you take calcium
supplements, you should always
balance them with at least half as much magnesium. It is dangerous not to do so.
See the American Family Physician, May 1, 2015 issue, p. 634-635.