They aren't a accurate test to prove anything when your dealing with generics, there was a thread what went into detail about testing gh & igf levels when I get time I find it for you it made really interesting reading about what other peps can do in these tests,but they prove nothing especially with the generics what use other peptides and growth releasing compounds. I even had various results from using pharm grade ( direct from the UK chemist)on these test using the same protocol to test myself. Its a mine field

but there is one way to be sure buy pharm from a good source.