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.
1 Some vitamins can actually enhance the absorption of other nutrients. 2  Vitamin C, for example, can enhance iron absorption from supplements and plant foods. 3  The fat-soluble vitamins (A, D, E, and K) are likely to be better absorbed if taken with a meal that contains fats.