If you're working out hard and want to build muscle, you may need [to eat] as much as 0.6 to 0.8g of protein per pound of body weight. For a 100lb. athlete, that's 60 to 80g of protein per day. Why so much? "You need to have protein to build muscle," explains Dr. Goldberg. "If you don't have enough protein, you end up chopping down your house to build a fire."
