True, but reversible: Calcium which is found in dairy, sardines, canned salmon, tofu, broccoli, almonds, figs, turnip greens and rhubarb is the only compound that blocks Iron absorption. Avoid taking Iron within 2 hours of Calcium rich foods. Phytates, which are found in most plant foods, can reduce iron absorption by up to 80%. But vitamin C—consumed along with a meal--can counteract that effect.
Answered 10/23/2020
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