Have you felt exhausted lately? Can you barely make it up the stairs without getting winded even though you're physically fit? If so, you might be lacking in iron -- especially if you're a woman.
Although many people don't think of iron as being a nutrient, you might be surprised to learn that low iron is the most common nutritional deficiency in the U.S. Almost 10% of women are iron deficient, according to figures from the Centers for Disease Control and Prevention.
Let's look at why iron is...
Tell your doctor about any supplements you're taking, even if they're natural. That way, your doctor can check on any potential side effects or interactions with medications or foods. He or she can let you know if the supplement might increase your risk.
The FDA does not regulate dietary supplements. However, it has approved an injectable branched-chain amino acid.