lesiva

Turning to the article's sources, you find [1] source for the testosterone claim. And the summary at the beginning of that study states the following:

"Vegans had higher testosterone levels than vegetarians and meat-eaters, but this was offset by higher sex hormone binding globulin, and there were no differences between diet groups in free testosterone, androstanediol glucuronide or luteinizing hormone."

So higher overall testosterone, the same amount of free testosterone. I think this is a perfect example of selectively reporting on scientific studies. The author of that article may not technically be wrong, but it encourages spreading bad advice when you repeat that claim over and over again without the caveats mentioned in the actual studies.

While true that plant proteins are not “incomplete”, it is also true that some aren’t absorbed as well [1] and are lower in certain essential amino acids than others. The article/video that you linked suggests that the essential amino acid profiles don't matter, even from plant proteins, because you get more than you need anyway but that's not true for everybody.

Importantly, if you're someone who is physically active or looking to gain muscle mass! When you're physically active, your body _does_ use almost all of the protein that you give it (at least, all of the protein it's able to absorb through digestion). And if you give it a deficiency in certain essential aa's that it can't create for itself, you can see less muscle growth. In that case, it is important to either stick to some of the more complete veggie proteins or to consume a combination of proteins that satisfy a complete amino acid profile.

I'd be happy to see research to the contrary.

I'd also encourage anyone reading to consider a vegetarian or vegan diet. Cutting out meat is pretty easy, even if you have to complement proteins for bodybuilding, and it's one of the best individual contributions you can make to inhibiting climate change.