Is my textbook lying to me?
So anyway in my ESSF class that I'm taking for fun/knowledge. It warns about high protein diets being harmful to kidneys exc. It also states that multiple studies were done and there was no benefit in muscle growth or athletic performance by taking in more than 15% of your diet comprised of protein. This pretty much defies everything I've read on this website about dieting, so do we need to subject ourselfs to massive amounts of protein just to repair miniscule tears in muscle fiber?