Linda, << Taken from Thorsons Guide to Amino Acids, by Leon Chaitow >> So fun to see his name unexpectedly. I had the pleasure of dining with him at a symposium last year. He is a fine writer of useful material, and a witty speaker. << Tryptophan is one of the amino acids in GNC's Pro Ammo, there is 500mg, that is why I waited until he was completely off of L-dopa medicine, the amino acids in this drink begin at 400mg to 2850 mg, this seems to me to be an awful lot, that is why I suggest deluting the drink. I have seen tryptophan in other products on the selves, but I cannot recall any names. Another source of tryptophan is turkey. >> Tryptophan naturally occurs (in different quantities) in most natural sources of protein. The truly goofy thing is that it is not available as an individual amino acid to consumers in the U. S. because of the scare in the early 90s -- but it is allowed as a constituent in any combination protein product that has any natural-source protein. And, of course, we're encouraged to eat waaaaaay too much Turkey once a year and more moderate amounts the rest of the time instead of fatty red meats. It's a good thing I love being entertained. << I know it is hard for my father to restrain from using the Pro Ammo everyday, just to get this boost of energy. >> This is just MHO, but why not let him do that? Has he tried it and had a bad response? I know you indicated concern about the amount of amino acids (and I can't quite tell what you're saying about those amounts--I think you're indicating that there are 400mg of one amino acid, varying amounts of others, and at least one that is nearly 3 grams). Amino acids occur in varying amounts in natural sources, so the range in the Pro Ammo is not unusual. (I LOVE the names marketers come up with for nutrient products! I just about fall down and roll around with my legs flailing up in the air -- you know, Parkinson's-like <g> -- when I see the bodybuilder energizer called UP YOUR GAS.) The U. S. RDA of protein is on the label, so you can tell what "too much" really would be. Anyway, it would be a reasonably safe experiment. If he has a bad response, you'd know not to let him run amok in the fridge any more. << I WAS a computer programmer >> I'm sending you some jokes privately. Don't want to take up anymore list bandwidth than I am longwindedly doing now. I will have to beg off the DHEA/pregnenolone discussion until a later post. Gonna massage my PD daddy's legs and feet and rub cuticle softener 'round his toenails. It's our special time together every night. Deanne [log in to unmask]