Can one use Humatrope, Serostim, Nutropin AQ, Genotropin, Omnitrope, or does it have to be blue top Saizen or they just won't get any results? For people that use insulin should they use the product from Eli Lilly, Sanofi, Pfizer, Novo Nordisk? Since blue top Saizen is so much better than all other GH, shouldn't one of the insulin products be so much better than another?