http://en.wikipedia.org/wiki/Xyrem

so xyrem is not illegal but it is highly regulated, ghb however is illegal.

ive tried tyrosine, but only in a mix of other amino acids contained in some whey protein. so i haven't tried it seperately, but together all those amino acids in the whey protein, helped me out for awhile, but then after awhile it stopped working all that well, maybe cause i wasn't working out enough or whatever.

i do however have an affinity for lysine. i think it helps with colds, and other things not worht mentioning.