There are numerous studies and schools of thought on ‘how much’ we need daily. These range from 0.8 to 2.2 per kg of bodyweight. I feel the lower number is the bare minimum for survival. I always try and teach to stay towards the upper range of that spectrum if you are active, participating in a fitness program, or looking to sustain and develop lean muscle tissue. Most of my active clients shoot for a 1gr per pound goal, where some may use the same calculation based on lean body mass. It all comes down to your goals and needs for recovery.