Here’s your age-appropriate protein prescription: AGE: 65 or under → PROTEIN: 0.37 g per lb of body weight; about 55 g per day for a 150 lb person AGE: Over 65 → PROTEIN: 0.45–0.5 g per lb of body weight; 68–75 g per day for a 150 lb person More from Prevention: The Metabolism Miracle For Women Over 40