Checkable
- A batch-specific Certificate of Analysis, provided before purchase rather than after
- An analytical method stated alongside every figure
- Batch numbers that agree across vial, box and certificate
- A verification route that checks a code against the manufacturer's records rather than against the packaging
- A stated storage condition and expiry, with the assumption behind them made explicit
Not checkable, and often meaningless
- A purity percentage with no method
- A generic certificate not tied to a batch number
- Claims of a manufacturing standard with no documentation behind them
- Photographs of laboratories
- Reviews, which are trivially fabricated and say nothing about the vial you will receive
The question underneath
The useful question is not "does this supplier claim to be good" but "what could I check if I wanted to". A supplier whose claims are all unfalsifiable has told you something, though not what they intended.
Research use only. This page is explanatory and does not recommend any use, quantity or procedure. REVIVE LAB supplies reference materials for laboratory research. These are not medicines and are not for human or veterinary consumption. Anyone considering the use of any compound in humans should do so only under qualified medical supervision.