It can be difficult to choose a generic form of GH, Para pharma has a good name behind them, some blood tests and lab tests that show good results. I have used Paratropin before and it was effective. Of course you never really know what your getting unless you actually get a GH serum test, or lab tests, If you get more tired or sluggish then usual, numb or tingly wrists, swelling of the hand and or feet, if your ring does not come off as easy as it always did that are a couple of signs you have real GH. Para Pharma GH worked well for me. Type Paratropin in the search bar and you can get more information on them.