Earlier topics such as Protein: How much is too much? acknowledge body mass but not muscle mass. I want to steer attention from recommendations in terms of body mass to muscle mass.
I cannot understand figures such as 1.5-2grams protein per each kilogram in your body. Suppose twin bodybuilders/crossfiters A and B with the same physical profile except differences in the amount of muscles and fat. Suppose a guy A with 90kg weight and 30kg muscle mass. Suppose a guy B with 70kg weight and 35kg muscle mass. I cannot understand why A should take more protein (i.e. 90*2=180grams) than B (i.e. 70*2=140grams)
where B being a guy with 7-8% fat body percentage requires far less protein than the guy A with 20-30% fat body percentage. My pre-assumption was that more muscle requires far more maintenance so B should take more protein than A in order to maximise muscle growth and keep the metabolism with a lot of muscles running.
I am very skeptical with statements that suggest to take protein according to body mass. I find that muscle mass is far more important to protein synthesis than the mass containing muscle mass, fat mass, liquids and bones. So
How much protein per muscle mass?
Why is protein usually suggested in terms of body mass and not in terms of muscle mass? (there are tools today to find the body profile with muscle mass and fat mass precisely enough)