How much protein does a person need?
That depends on your weight, height and activity level. If you are working out regularly, the common recommendation for gaining muscle is 0,7-1 grams of protein per pound of body weight or 1,5-2 grams of protein per kg.
Numerous studies have tried to determine the optimal amount of protein for muscle gain and many of them have reached different conclusions.
Some studies show that over 0.8 grams of proteins per pound have no benefit, while others show that intakes slightly higher than 1 gram of protein per pound is the best.
If you’re carrying a lot of body fat, then it is a good idea to use either your lean mass or your goal weight, instead of total body weight, because it’s mostly your lean mass that determines the amount of protein you need.