5 ms·Right, because meat is the only viable source of protein for humans....?by bryal 8y agoRight, because meat is the only viable source of protein for humans....?shakkhar 8y agoYou know of a cheaper one which is as protein-rich?howiroll 8y agoOnly source of quality rich proteins. You’re correct.olliej 8y agoThat is affordable and effectively absorbable? Yes.