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.
Key to Protection from Age-associated Disease: AM/PM. Vitamin C is absorbed and excreted over 12 hours: Water soluble vitamins and minerals are necessary every 12 hours to maintain the elevated levels that are likely to provide optimum health.