@whirly @snacks ~60-80g protein daily for ~70kg sized man should keep muscle
~100-120g to be able to easily build muscle
less than ~40g to lose muscle
modify protein g-s higher if you are extra buff muscled
g-s higher if you are bigger weight
g-s lower if you are smaller weight
or if you want the scientists
anything over 1.3g/kg (grams of protein per kg of body weight) will help you build muscle mass
going below 1.0g/kg maydecrease your muscle mass, at 0.7g/kg should decrease your muscle mass