A Dr. Anthony Komaroff, MD, Internal Medicine, answered. The innate immune system is first and best known for a family of white blood cells called phagocytes, which reside very close to the layer of epithelial cells that line much of the body's surface. Dr. Anthony Komaroff, MD, Internal Medicine, answered. The innate immune system is first and best known for a family of white blood cells called phagocytes, which reside very close to the layer of epithelial cells that line much of the body's surface.
The iron content of the body is highly conserved (Bothwell et al 1979). To achieve iron balance, adult men need to absorb about 1 mg/day and adult menstruating women about 1.5 mg/day, although this is highly variable. Towards the end of pregnancy, the absorption of 4-5 mg/day is necessary. Requirements are higher during periods of rapid growth in early childhood and adolescence.
How Much Is Too Much. The RDI for zinc is 11 mg per day for adult men and 9 mg per day for adult women (except pregnant/lactating women, in which case it's 11 and 12 mg per day, respectively). The upper limit for adult men and women is 40 mg/day before it becomes toxic (including pregnant/lactating women).or men, zinc is particularly interesting since it has a direct link to the body's natural testosterone production. This hormone is what makes a man a man in everything from musculature and facial hair to performance in the bedroom.