I hear people say its unnatural and you shouldn't take it but is there really a negative side to drinking protein shakes/power. I don't like meat and don't eat too much soy because it raises estrogen levels, and I'm a guy, and my parents don't have time to cook vegetarian food.

Is there any side affects or any downside if I drink it before a workout as a replacement for my daily amount of proteins, when I'm 16?