The X and Y Chromosomes Determine Your Sex. One chromosome pair - the sex chromosomes - is unique. You don't necessarily end up with a matching pair. Typically females have two X chromosomes and males have an X and a Y. Mothers always pass an X chromosome on to their children.
On the other hand, the absorption of nonheme iron, the major dietary pool, is greatly influenced by meal composition. Ascorbic acid is a powerful enhancer of nonheme iron absorption and can reverse the inhibiting effect of such substances as tea and calcium/phosphate.
High doses of vitamin B-5, pantothenic acid, may inhibit your absorption of biotin, according to nutritionist Jane Higdon, co-author of the book An Evidence-Based Approach to Vitamins and Minerals: Health Benefits and Intake Recommendations.. Similarly, high doses of vitamin A can inhibit vitamin K absorption.Conversely, some vitamins are absorbed more efficiently in the presence of other vitamins. Vitamin C increases the absorption of chromium and iron. Some vitamins participate in the transport of other vitamins into the body.Copper is necessary for iron absorption, and a deficiency can lead to low iron levels.imilarly, high doses of vitamin A can inhibit vitamin K absorption. Conversely, some vitamins are absorbed more efficiently in the presence of other vitamins. Vitamin C increases the absorption of chromium and iron. Some vitamins participate in the transport of other vitamins into the body.