Come te la cavi con l'inglese?
In sostanza qui sotto dice che nel contesto di una normale dieta variata non fa differenza se l'integrazione è fatta con proteine animali o vegetali o quanta leucina contiene
Can You Get Ripped on Plants?
This is a topic that inspires strong feelings, to put it mildly. There have long been studies showing that some protein sources are better than others, at least in isolation. Protein sources that contain high levels of an amino acid called leucine seem to be particularly effective at stimulating the synthesis of new muscle, which explains why dairy protein outperforms soy protein in head-to-head, gram-for-gram matchups.
But no one lives on soy (or dairy) alone. Do those subtle differences matter if you’re eating a broad diet with many different sources of protein? Another Brazilian study, this one from a group led by Victoria Hevia-Larraín of the University of São Paulo, explored this question by enrolling 19 vegan and 19 omnivorous young men in a 12-week, twice-a-week strength training program. Both groups were given protein supplements (either soy or dairy) to equalize their protein intake at a goal level of 1.6 grams per kilogram of bodyweight per day, which is twice the recommended minimum for sedentary adults but a relatively typical level for athletes.
The results in brief: no differences between the two groups, which each increased muscle mass by about 6 percent and strength by 38 to 49 percent. So the subtle differences in protein “quality” (e.g. leucine content) seemed to matter less than simply getting a sufficient amount of protein. You could argue, of course, that getting enough protein is trickier if you’re avoiding meat and dairy. But that’s really a different question. It’s certainly possible to eat like crap no matter what dietary tribe you belong to; what this data suggests is that it’s possible to get the protein you need, even as an athlete, on a plant-based diet.
https://www.outsideonline.com/2397820/l ... e-building