Medically reviewed by Suzanne Fisher, RD Key Takeaways Active adults need 1.2-2.0 grams of protein per kilogram (g/kg) of body weight every day to build muscle.People with low activity levels need ...

While the amount of protein needed varies, the general guideline from organizations like the US National Academies (Dietary Reference Intakes) suggests about 0.8-1.0g of protein per kilogram of ...