I think it is very confusing, it seems like the doctor is alone in his theory of whey isolate (which he purports promotes hair-loss) vs. whey concentrate (which he says helps hair-grow). I to be honest want to believe in it, but if you think about it, protein is protein - you could get it from egg whites, meat, poultry or from his shake (and guess what he says, his shake only, lol). And then he posts his research merely on his own site and not in some printed journal. He has a patent 'pending' and not approved. Maybe others can chime in, as I would confess to not know much here, but other than that I do see that the product has very good quality ingredients and the price could itself justify as you wont be needing to separately eat all those needed vitamins.