In studies conducted at Kansas University Medical Center, a
double-radiosotope technique was used to assess the effect of three types
of calcium supplements (calcium carbonate, citrate, and phosphate) on
absorption of either a ferrous sulphate supplement or nonheme food iron.
When taken without food, calcium carbonate did not inhibit the absorption
of ferrous sulphate; however, at relatively high doses (600 mg), both
calcium citrate and calcium phosphate significantly reduced iron
absorption, by 49% and 62%, respectively. When taken with food, all three
calcium supplements inhibited the absorption of the iron supplement, by
40-57%. They also inhibited the absorption of non-heme food iron. The
degree of inhibition varied with the composition of the test meal. This
study was reported in the Nutritional Research Newsletter, March, 1991.
Centrum Silver is recommended to be taken with meals so one would expect a
significant reduction in absorption of the iron in the product. I'm not
sure but I think that Centrum Silver is designed for older women whose iron
needs are minimal.
I thought it was important to share this information with you, that some or all Centrum Silver vitamins now have iron in them. We want to reduce incidence of iron overload and the addition of iron may do more harm then good to older individuals.
Post from Cal....ExcessIron Support group..www.irondisorders.org
Isabelle
