Yeah, that would be news to all the big Herbivores. Rhinos, elephants, Bison, Giraffes, Buffalo all have some pretty stout muscles, despite never eating an ounce of meat.
Animals produce their own proteins from Amino Acids. same thing with fat, accept in the case of fat the body uses fatty acids.
Now it is easier for the body to break down protein that is consumed into amino acids and use them to create its own protein, but its not a necessity. Animals are capable of cobbling together protein from scratch, although the trade off is that herbivores have to consume vast quantities of plant matter to accomplish this.
Humans are not those animals, they have completely different physiologies and the comparisons are not applicable in the slightest.
Yeah, you're wrong. You're confusing estrogen with phytoestrogen; one major difference being that current evidence suggests that phytoestrogens don't bioaccumulate.
Soy protein is estrogenic in males. The journals of clinical nutrition are publishing studies on it more and more every day. Soy contains phytoestrogens, which are estrogenic, one of the reasons it's used for hormonal balance in menopausal women. So far the two most definitive studies show statistical reduction in test levels from consuming an average of 56g of Soy protein per day, and returning to normal of said levels when consumption was ceased. Yet another study shows Soy protein might contribute to fighting prostate cancer, BECAUSE it significantly lowers testosterone levels, that being one of the main treatments for prostate cancer.
So those suggesting Soy protein boosts estrogen in males, are correct. The anomaly to that is Asian males, however they've been consuming soy in different numbers, and not the same sources of soy, for hundreds and in some cases thousands of years.
Working out a ton will build muscle, no matter what you eat.
False. Houses don't get built without bricks, regardless of how hard you work.
Jesus there's a lot of ignorance in here.
Genetics is probably the biggest factor.
Finally, someone smart after scanning 4 pages of this stuff.
Making significant athletic gains as a vegan is an anomaly, anyone who claims to do it is either lying about their intake, or is a bit of a physical anomaly, or is among the most meticulous about their macronutrient portioning and consumption people in existence. Making protein from plant sources without supplementing typically results in higher fat and carbohydrate consumption than protein consumption in order to make full amino profiles.
P.S. - This is typically covered a lot in the dieting and supplementation section of the board, in fact, I'm moving this thread there.