What is the RDA protein per kilogram body weight?

• A. 0.4 g/kg
• B. 0.2 g/kg
• C. 0.8 g/kg
• D. 1.0 g/kg

Answer: (C)

RDA for protein in healthy adults is 0.8 g per kilogram of body weight per day. This amount comes from nitrogen balance studies to ensure enough protein is available to maintain body tissues and normal function in most adults. It’s higher than the very low intakes like 0.2 or 0.4 g/kg, which would risk deficiency, and while some people—such as athletes or older adults—may benefit from higher intakes, the standard RDA is 0.8 g/kg. For example, a person weighing 70 kg would aim for about 56 g of protein daily.