alt Hacker NewsTest what, exactly? Purity? LPS contamination? They cant test for every last picogram of material in it. Did they test for viral contamination?
Even drug addicts heat up the thing they inject so theyre actually safer than you can ever be. Dont inject things from China into your blood!
High-Performance Liquid Chromatography so purity and concentration.
Back when I started few people were doing this and it was more of a risk, I was buying from research peptide vendors who had their own testing practices, but now a huge number of people are doing it and there are markets where reputations matter and it appears to be reasonably efficient.
I would prefer not to inject peptides from gray market China but practically all of the gray/black market supply is from there. I will likely switch to pharma grade when generics become available.