And then of course the estrogen plays a part to... causing the body to have more body fat than guys, more curves and less muscle building capacity. (liftingrevolution.com)
This is the bodybuilding rule number one, of course, but there is another side to the coin — if you give your body some rest from all of that protein, it will freshen up your metabolic muscle building capacity. (fitnessandpower.com)
Casein also promotes prolonged absorption of the amino acid leucine, which has been linked to increased muscle building capacity (13, 14, 15). (healthline.com)