How to read community peptide talk: a slang & literacy glossary

Why this page exists: peptide discussion online runs on code. Compounds are renamed to dodge search filters and content moderation, doses are quoted in ways that hide what's really being taken, and marketing language ("99% pure," "research use only") is engineered to reassure. If you can't decode the language, you can't assess the risk — and you can't even find this site. Decoding it is itself harm reduction.

1. Why the slang exists (and why that's a warning sign)

Communities rename compounds for two reasons: to keep posts from being removed by platforms, and to signal insider status. The practical effect is that a beginner often doesn't know the formal name of what they're injecting — which means they can't look up its evidence, its risks, or its interactions. The renaming isn't neutral shorthand; it's a symptom of an unregulated space where the normal safety scaffolding (a real name, a label you can trust, a pharmacist) has been removed.

2. Slang -> compound -> evidence tier

Treat any slang term as an unverified identity claim — especially because mislabeling is common (a vial sold under one name may contain another). Common terms:

  • "Reta," "GLP-3," "ratatouille" -> Retatrutide (investigational triple agonist). Tier B, not approved anywhere. The "GLP-3" name is invented marketing — there is no drug class called GLP-3.

  • "Tirz," "tirze," "Mounjaro/Zep" (off-label) -> Tirzepatide (dual agonist). Tier A, approved.

  • "Sema," "Oz," "Wegovy/Ozempic" (off-label) -> Semaglutide. Tier A, approved.

  • "BPC," "Body Protection Compound," "the healing peptide" -> BPC-157. Tier C, animal data only.

  • "TB4," "TB-500," "Thymosin" -> TB-500 / thymosin beta-4 fragment. Tier C.

  • "MT2," "MT-II," "the Barbie drug," "the tanning peptide" -> Melanotan II. Tier C with documented harms.

  • "GHK," "copper peptide," "the glow peptide" -> GHK-Cu. Topical/skin data; injected/systemic use unsupported.

  • "Wolverine," "GLOW," "KLOW" -> named injectable blends (see the stacks pages). No combination evidence.

  • "CJC," "Ipa," "CJC/Ipa" -> CJC-1295 + Ipamorelin growth-hormone-secretagogue pairing.

This list will grow — slang mutates precisely to stay ahead of moderation. The skill that transfers is: never accept a nickname as proof of what's in the vial.

3. The two reading skills that defuse most marketing


Substrate is an independent educational harm-reduction resource. It is not medical, legal, or regulatory advice, and it is not a substitute for a licensed clinician. Compounds discussed are largely unapproved in Canada; nothing here endorses their use. Confirm anything health-related with a qualified professional. Built by a medical-sciences student — not a seller and not a clinic.

Purity is not potency. Sellers advertise "99% purity." Purity is a statement about contaminants — it says nothing about whether the vial contains the correct amount of the correct compound. A "99% pure" vial can be the wrong compound, or the right compound at the wrong dose. The metric that matters (identity + quantity of active ingredient) is exactly the one a purity claim doesn't address.

"Research chemical" / "not for human use" is a legal shield, not a safety statement. That label lets a seller move an unapproved substance without making medical claims. It does not mean the product is purer, safer, or tested for human use — it means the opposite: no regulator has evaluated it and no one is standing behind it.

4. How doses hide in the language

  • A dose quoted in "units" (from an insulin syringe) is meaningless without the reconstitution concentration behind it — the same "10 units" can be a very different dose depending on how much water was added (see the reconstitution-math page).

  • "Microdosing" a compound with no approved dose (e.g. retatrutide) is not a defined, safer protocol — it's a smaller guess.

  • Copied dose numbers assume you match a stranger on body size, physiology, goal, medications, and vial concentration (see the dosing page).