Key facts at a glance
| Retatrutide sizes | 10, 20, 30 mg |
|---|---|
| Price | $4.90/mg (10 mg) to $3.20/mg (30 mg) |
| Third-party testing | Freedom Diagnostics, 99.62% (10 mg, May 2026) |
| Ships from | US (state not stated) |
| Shipping | $10 standard · $15 priority · free over $250 |
| Payment methods | Cards except Mastercard, Apple Pay, Google Pay, Venmo, Zelle |
| Guarantee / refunds | Sales generally final; damaged or wrong items reviewed within 7 days |
| Best for | Budget buyers who want a COA for each size and card payment |
Pros and cons
- Product page describes the compound as a GLP-1/GIP/glucagon triple agonist
- Separate Freedom Diagnostics COA with endotoxin results for each size
- Low prices, with 3-, 5- and 10-pack options
- Phone, email, LLC name and mailing address published
- Retatrutide not named and no CAS number; the formula and CAS fields are blank
- Checkout asks for a research institution or company, and orders without one may be declined
- Not responsible for packages lost in transit
- Only 2 Trustpilot reviews; domain registered January 2026
Bottom line
Endura Peptides is inexpensive and posts a lab report for each retatrutide size, but it is a young store with a very short catalog and almost no independent reviews.
Products and pricing
“GLP-3R” is described as a synthetic peptide that acts as a triple agonist at the GLP-1, GIP and glucagon receptors. The page never uses the name retatrutide, and its molecular formula and CAS fields are empty. Prices: 10 mg $49, 20 mg $88 and 30 mg $96, all in stock. Packs are cheaper per vial (10 × 10 mg $392; 5 × 30 mg $408).
Testing
The product page shows a separate Freedom Diagnostics COA for each size, all dated May 28, 2026: 10 mg 99.62%, 20 mg 99.93% and 30 mg 99.92%. The 10 mg report (lot R10) covers two vials, averaging 11.64 mg, and both endotoxin replicates passed. LC-MS identity is listed as “GLP RT”.
Shipping and payment
Weekday orders placed by 1 pm PT ship the same day. Standard shipping costs $10 (3–5 business days) and Priority costs $15 (2–3 days). Priority is free over $250. PO boxes go by USPS. The company ships only within the US but does not say from which state. Shipping problems must be reported within 72 hours, and insurance is optional. Payment options are credit cards (not Mastercard), Apple Pay, Google Pay, Venmo and Zelle.
Policies and support
Sales are “generally final”. At its discretion, the company may refund, replace or give store credit for damaged, defective or wrong items reported within 7 days. Opened products cannot be returned. Risk passes to the buyer at shipment. Checkout asks for a research institution or company, and the terms say orders that cannot be tied to one may be declined and refunded. Support is by email or phone at 301-241-7211, Monday–Friday 9 am–5 pm ET. The refund policy names Endura Research LLC, 30 N Gould St Suite R, Sheridan, WY 82801.
Reputation
The domain was registered January 5, 2026. Trustpilot shows 3.8 from 2 reviews, both five-star, on a profile claimed in August 2026. We found no FDA warning letter or Eli Lilly lawsuit naming the company.
Alternatives to Endura Peptides
Scores use the weighted criteria explained on How We Rate. Vendors change prices and policies often — confirm details on the vendor's site before ordering. Retatrutide is an investigational compound and is not FDA-approved; see our medical disclaimer.