Ironically Ovaltine manufactured the first legit(and some still consider the best) protein supplement in the 50s, Rheo Blair's Instant Protein. Low heat processing of milk kept all the amino acids in usable form, whole eggs, and the 2:1 Calcium to Phosphorus formula. Vince Gironda and all the true oldtimers(way before Arnold) were making gains naturally on this stuff in the pre steroid era.