For health and longevity, I think maybe something predominantly plant-based (but not entirely) might offer an edge. Short height also offers an edge (shorter people tend to live longer). But for height and mass, I really think there's something to meat and dairy.
I think it might be possible that a very careful vegan starting from a baby might be able to match the mass and height of one who consumes some meat and dairy and fish and the like, but I think they have to be very careful and precise with respect to BCAAs, macros ratios, and micros.
Most plant based proteins are not complete proteins, unlike animal proteins. The main source of protein for most vegans is soya, which has been proven to decrease testosterone levels.
On their own no. Which is why i specified a balanced diet. Soy is a complete protein. That myth about soy has been debunked years ago. I just like the taste of meat too much to go vegan lol.
When you look at who funds which studies you can see how they come up with conflicting results. The ones which supposedly debunk the "myth" are almost always funded by companies who market and profit from selling soy products. There's also a difference between the type of soy that was originally grown in East Asia, and the genetically modified soy they use now in most of our products.
@englisc Yup so much bull shit out there as "science".
Yeah, soy isoflavones are phytoestrogens. haha
Scroll Down to Read Other Opinions
There's a lot of debate over this topic, and obviously things differ from one individual to the next. I'm talking about "on average" only, since there are some vegan athletes that are quite strong.