Where to buy retatrutide in 2026
Vendor landscape, COA verification, and what to know before ordering. Updated monthly.
updated · · 4 days ago
affiliate disclosure · We earn affiliate commission on some vendor links. Audits, scores, and rankings are independent — vendors do not pay for placement and do not see drafts. read more →
The shortlist
As of the April 2026 audit cycle, three vendors carry retatrutide with COA quality good enough for our top tier: Limitless Life, Particle Peptides, and Amino Asylum. Each has trade-offs — see the full audit pages for the breakdown.
For the freshest vendor list and active coupons, check /peptides/retatrutide/vendors.
What to look for in a COA
A retatrutide COA should include both HPLC purity (target: >95%) and mass-spec identity confirmation (target: matching molecular weight within 1 Da). Vendors who only publish HPLC and not mass-spec are leaving the question of identity open.
read next
More from the desk
how-toHow peptide vendors fail: a taxonomyEight failure modes, ranked by how often they appear in public Janoshik data and how hard they are for a buyer to catch before ordering.11 minnewsWhat 7,164 Janoshik tests reveal about peptide vendor purity43% of vendor-claimed purity figures failed independent retesting. The gap concentrates in three patterns you can avoid before clicking buy.8 minhow-toPeptide reconstitution: a research guideBacteriostatic water, syringe selection, dose math, storage. The reference we wish existed when we started.15 min
the roundup · monthly
Receipts in your inbox. Once a month.
New audits, expired coupons pruned, lab notes from vials still on the bench. No marketing. No lifestyle copy. Unsubscribe in one click.
14,200 subscribers· 0 sponsored items· 11 issues since launch