Start with the compounds that actually move the needle
Looksmaxxing peptide buying splits into four pillars — body-recomp, recovery, skin, and aesthetic finishing. The core catalog you actually buy against looks like this:
- Retatrutide — the triple-agonist that produced the −28.7% phase 2 figure that drove the category mainstream. This is the body-recomp engine.
- BPC-157 — the gut and connective-tissue guardrail that makes aggressive GLP-1 protocols tolerable week-to-week.
- GHK-Cu — the collagen and skin-matrix peptide that keeps the new face showing well instead of hanging slack after rapid fat loss.
- TB-500 — the systemic recovery counterpart to BPC-157 for anyone running the protocol through a hard training phase.
What the certificate of analysis should actually show
A legitimate CoA is lot-specific, not a generic brochure. It should include:
- Lot number matching the physical vial you receive
- HPLC purity of ≥98% (treat ≥99% as the mark of a serious supplier)
- Mass spectrometry confirming molecular weight
- Appearance, pH, residual solvents — the boring rows that prove the compound actually got tested
- Manufacture and retest date
If the CoA is a PDF the same for every product, walk away.
Picking a vendor in 2026
Four checks separate the credible vendors from the pill-mill clones:
- Cold-chain where required — GLPs specifically want to ship with ice packs in warm months.
- US-side fulfillment — 2–5 day USPS/UPS transit, tracked. Sites shipping 'from overseas' often mean your box sits in customs for weeks.
- Lot-traceable CoAs on request, not a screenshot of a single generic test.
- Clear research-use-only framing — the niche's standard legal framework. Vendors that promise human dosing advice are exposing you and themselves.
Before you click add-to-cart
Four last things to check:
- Dose size vs. protocol length — a 15 mg Retatrutide vial is a full 8-week escalation; 10 mg covers the first month.
- Bacteriostatic water stocked — lyophilized powder has to be reconstituted and BAC water has 0.9% benzyl alcohol so the vial lasts 4 weeks refrigerated.
- Free-shipping threshold — most catalogs cross it at $200. A full looksmaxxing stack usually clears that on its own.
- Return policy — 30-day returns on unopened, sealed vials is the industry standard. Anything less is a warning.
The bottom line
Buy compounds with real peer-reviewed backing, from a vendor that ships lot-traceable CoAs, and verify cold-chain on temperature-sensitive orders. Everything else — marketing, testimonials, influencer endorsements — is noise.