Measured purity and lot number appear on every product card
ConfirmedRead off the catalogue page with nothing in the basket and no account. OS-3 RT shows 99.87% against lot OSL-GLP3RT10-02, GHK-Cu 99.87% against OSL-GHKCU50-01, Tesamorelin 99.80% against OSL-TSM10-02, Thymosin Alpha-1 99.02% against OSL-TA1-01. Every listing carries both. This is the furthest any vendor in our catalogue goes, because it answers which lot and how pure before the purchase rather than after it.
Where the vendor states this