Eight research areas, one catalogue

The catalogue can be read two ways. Product-first: find a compound, read its page, check its certificate. Or area-first: start from a research question, see which compounds the literature attaches to it, and work inward. This page serves the second route.

Each area page follows the same contract: what the field actually studies, what the evidence honestly supports, which compounds we stock for it, and what to read next. Where a literature is thin, the page says thin, the sleep area is four sentences of candour for a reason.

Areas overlap, deliberately. NAD+ appears under energy and features in the knowledge base as not being a peptide at all; the GLP-1 class anchors weight but reaches into metabolic work broadly. The links between pages are the map; every page connects to its neighbours.

The eight peptide research areas on this site follow the questions the literature asks, not the chemistry of the molecules. A receptor family can anchor one area while a single compound sits in two, because the boundaries are drawn around what was measured and in whom rather than around sequence length or synthesis route. Follistatin 344 is filed under both muscle and recovery for exactly that reason: two separate research conversations picked it up with different questions in mind, and neither listing is a cataloguing error.

Evidence quality is the second axis, and it does not line up with the first. The weight area rests on compounds with registry entries on ClinicalTrials.gov and authorised medicines behind them; the recovery area rests on rodent and cell work with very little human data behind it; sleep is thinner again. Reading an area page means holding both axes at once, what the field is asking, and how far the answer has been tested, and where a page says the human data is absent, that sentence is the most important one on it.

Two things stay constant across all eight. Every compound is sold under the same research-use-only classification whatever the depth of its literature, and every batch carries a certificate to the same standard; the area pages change the question, never the standard. That is also why no area is ranked above another by promise. The GLP-1 pathway page and the sleep page are written to one rule, and only the evidence each can cite differs, a search of the peptide literature on PubMed shows how uneven that evidence is, with the incretin class returning a deep body of trials and several cognition compounds a thin one.

Pick your question

One line of honest summary each. The pages carry the rest.

Pages that serve every area

Whatever the research question, these four apply.

About the areas

How this index relates to the rest of the site.