One "tested" label can hide three different questions. Here is how to tell identity, content and purity apart and ask a supplier for exactly the evidence you need.
The research-only wording on a Wolverine listing is only useful if your records carry it forward. What to log on arrival, who handles the pen and how to document transfers.
One GLOW pen or three separate peptides? A fair comparison covers listed contents, format and batch documentation. It never rests on claims about outcomes.
A quick, polite reply is not the same as a useful one. Five specifics to look for in a supplier's answer, and how to write a follow-up that gets a straight response.