[Caution] research use only. handling questions welcome, protocols are not.
research use only. handling questions welcome, protocols are not — a position I have arrived at slowly and would like tested. Asked QYB for the theoretical mass alongside the certificate and they sent it without asking why. Kept a reconstituted vial too long out of curiosity and learned something about solution…
Research-use-only material is not approved for human use. In this board that is not a formality — it is the reason the clinical evidence base is as thin as it is.
Ask for the theoretical mass alongside the measured one. It is a one-line addition to a certificate and it converts a purity claim into an identity claim.
Assumed regulatory status was static and it was not. Checked again this year and the answer had changed where I live.
Purity by area percent tells you the sample is homogeneous. Mass spectrometry tells you what the homogeneous thing is. For a short peptide, the second question is the one worth paying for.
research-use-only means not approved for human use, and here that covers everything
identity testing matters more here than purity does
The published literature is overwhelmingly preclinical, largely in rodent models. Translating a rodent result into a human expectation is not a small step, and almost every confident claim here takes it silently.
Left up. It distinguishes rodent work from human work, which is the standard on this board.
Bought small, tested identity first, and only then thought about anything else. That order felt right.
preclinical enthusiasm is not clinical evidence