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.
1 Between 19 and 50 years of age, you should get 18 milligrams of iron a day.  Pregnancy â During pregnancy you need more iron and should get 27 milligrams a day. Some women suffer from anemia and need even more iron, up to 60 milligrams a day as directed by their doctor.