Yes, and people nowadays are taller, smarter, and live longer. A large part of the Flynn effect is usually attributed to nutrition. Humans can survive with poor nutrition (not getting the right amount of nutrients they need) for a very long time, but it usually has consequences, especially when it happens during childhood.
Another thing to keep in mind is that humans didn't evolve to be farmers. We evolved to be hunter-gatherers. Just because for a slice of our existence people ate one way doesn't mean that that's the diet most suited for us.
By the way, there's a difference between animal proteins and protein in grain. They aren't quite the same composition of amino-acids.
Another thing to keep in mind is that humans didn't evolve to be farmers. We evolved to be hunter-gatherers. Just because for a slice of our existence people ate one way doesn't mean that that's the diet most suited for us.
By the way, there's a difference between animal proteins and protein in grain. They aren't quite the same composition of amino-acids.