Why so worried? Lots of old assumptions about HGH have already been disproven. Do you know how much daily HGH a person with HIV takes to avoid unwanted muscle loss? 18 iu per day. The older you get the lower your IGF-1 level becomes; by age 50 it is only half what it was at 21. That is why HGH use fits better at later ages. 1.5 iu is fine for quicker hair growth and better nails. Around 4 iu is where it really starts to work. Raise the dose slowly to that level. Since the HGH was bought on the gray market you can comfortably use about 4 iu. Real pharma-grade HGH at 2 iu is comparable to 4 iu of gray-market product because mannitol and freeze-drying affect potency. Keep in mind HGH is not a one- or two-month thing; its real effects show after at least six months. It is true that active cancer cells can be stimulated by HGH, but high sugar does the same, so check blood markers beforehand.