Individuals with high training volumes may require closer to 2 grams of protein per kilogram of body mass per day to promote muscle growth.

“what was really found in that study was that even going from like 1.2 g per kilogram body weight per day obviously to 1.6 six grams per kilogram body weight people gained about 27% more lean body mass and 10% more muscle strength”

“A key meta-analysis led by @mackinprof shows that supplementing resistance training with extra protein can boost lean body mass by up to 27%.”

“Integrating up to 1.6 grams of protein per kilogram of body weight with your training could increase lean body mass by as much as 27% more than through training alone.”

“So the meta-analysis was essentially then an attempt to reconcile, you know, "We've got all of these studies. What does protein do for lean body mass?" And the answer is, if you're younger and you're resistance training, so you're lifting weights, you want to get a bit bigger, a bit stronger, 1.6 grams of protein per kilo per day was the type of intake that you need to consume. But the effect is small.”

“with increasing amounts of protein so when you start to get up to like for younger people 1.6 grams per kilogram body weight was associated with a modest increase in muscle mass but it was very minor increase in strength”