reading secretagogue threads from 2024 and half of it aged badly
reading secretagogue threads from 2024 and half of it aged badly, which sounds obvious until you try to state the evidence for it.
Research-use-only material is not approved for human use. In this catalogue that covers essentially everything, which is why the board discusses material and analytics rather than outcomes.
Asked WXT which lines they keep in regional stock versus make to order and got a clear split. It changed what I ordered.
Sent an unusual compound to Medutest because nobody on this site had ever posted one. 98.7% against a claimed 98.0%.
Corrections welcome, especially the pedantic ones. Pedantry is how this board earns its reputation.
best — the order this archive was captured in
The three questions to ask before ordering anything from the long tail of a catalogue.
What exactly is it — catalogue number or sequence, not a common name, because several common names map to more than one molecule. How was identity established — mass against theoretical, ideally, rather than a bare purity figure. What are the storage conditions, stated specifically, with a state and a duration attached.
Then two commercial questions that save time: is this a stocked line or made to order, and what is the lead time in writing. All five are one email, and the shape of the reply tells you a great deal before any material moves.
Small fix — that is net peptide content, not purity. Both are on the certificate and they differ substantially here.
Disagree — that name refers to at least two different molecules depending on who is selling it. The thread needs to be specific.
research-use-only material is not approved for human use
What reference standard was the assay run against?
Stocked line or made to order — did they say?
Why purity and net content diverge, and why that is usually honest.
Purity by area percent is a relative measure of what the detector saw. Net peptide content subtracts counterion, water and residual solvent from the powder mass. For some compounds in this catalogue the gap between the two is large.
A vial can therefore be 99% pure and contain considerably less peptide by mass than the label weight suggests, with nothing wrong anywhere. The problem is not the chemistry; it is that people compare a purity figure from one supplier with a net content figure from another and conclude something about both. Ask which number you are being shown, every time.
Same. Net peptide content is where the difference between the label and the vial actually shows up.
On the thin testing history in this board, and what to do about it.
Most of the compounds discussed here have a handful of independent results across the entire site, and several have none. That is a fact about how few members have paid for testing, not a judgement about the material.
What follows: buy small, test identity first for anything unusual, and post the result even when it is unremarkable. The vendor source pages are built from exactly these submissions, and the compounds with the thinnest coverage are the ones where one more entry changes the picture most. Research material is not approved for human use, so what this board can usefully build is an analytical record.
Left up. Identity-first reasoning with a method stated, which is the standard for this board.
That method was developed for a different compound class and would not resolve the impurities you are asking about.
Net peptide content on the certificate was well below the purity figure and both were honest. Chemistry, not deception.
Not convinced. A purity figure without a stated method is not comparable to one that has a method attached.
Not convinced.
This is the rule for anything unusual. Identity before anything else.
This. Asking what reference standard was used separates a real analytical claim from a plausible-looking one.
the same name covers several different molecules in this space
I would not treat catalogue breadth as a quality signal. It is a business decision, not an analytical one.
Right — GGPeps answered a handling question with actual storage conditions rather than a generic line, which is the standard.
lyophilised and stored cold is the default for a reason
- 1The three questions to ask before ordering anything from the long tail of a…8 comments in this branch · started by u/batch_number_bertie
- 2Net peptide content on the certificate was well below the purity figure and…8 comments in this branch · started by u/rui_only_ro