Recommended Dietary Allowance (RDA) measured in grams per kilogram of bodyweight (g/kg of bw):
Adult Population (18-50yrs old): .8 gram per kilogram of body weight (g/kg of bw). Endurance Athletes: 1.2-1.4g/kg of bw. Strength Athletes: 1.6-2.2g/kg of bw. Adolescence (4-18yrs old): .85-.95g/kg of bw. Seniors (50+ yrs old): 1.2g/kg of bw.