All breast milk contains DHA, but levels of this essential nutrient are higher in the milk of women who get more DHA from their diets.

Daily iron pills might make sense, experts say, because plenty of women are iron-deficient as they age; they either don't get enough iron from their diets or are low because of blood loss during their periods.

Meat eaters get about half that from their diets (a half-pound of meat has about 1 gram); the rest is made in the body.

Most people get enough vitamin A from their diets.

This medication is used to prevent or treat low blood calcium levels in people who do not get enough calcium from their diets.

Vitamin A is used to prevent or treat low levels of the vitamin in people who do not get enough of it from their diets.

The IOM states that most North American adults get enough vitamin E from their normal diets to meet current recommendations.

However, vitamin D supplements are not recommended for people who get enough vitamin D from their diets and from sunlight.

So, Dr. Siris said, her suggestion is that doctors urge the supplements only upon women not getting enough calcium, 1,200 to 1,500 milligrams a day, from their diets.

We get some creatine from our diets, mostly from meat and fish, and our bodies make the rest naturally.