Protein ABCs. (basics).(nutritionists comment)(Brief Article)(Panel Discussion)

From energy drinks and powders to power bars and cereals, more products than ever are packed with extra protein. But just what does protein do for us anyway?

Three experts in the field--Ann Yehnokas McDermott, PhD, of the Jean Mayer US Department of Agriculture Human Nutrition Research Center on Aging at Tufts University in Boston; Dr. Michael R. Eades, MD, co-author of Protein Power: the High Protein/Low Carbohydrate Way to Lose Weight, Feel Fit and Boost your Health in Just Weeks; and his wife Mary Dan Eades, MD--shared their knowledge, in this edited interview. The full text is available online at betternutrition.com.

Q: How does the body use protein?

A: Our body uses protein to build and repair cells as they wear out. Protein maintains blood pressure and water balance in our cells. For example, it transports insulin in and out of the cells, helping bring glucose (blood sugar) from the blood to the cells where it's used as energy.

Q: I'm cutting down on meats. How do I integrate vegetable protein sources into my diet?

A: Tofu, tempeh and other soy foods are complete proteins, but most plant proteins are deficient in one or more essential amino acids, making them incomplete. If you eat them together, however--say peanut butter on whole wheat bread or beans and rice--you can get the benefits without the meat.

Q: Is a high-protein, low-carb diet healthy?