Key facts at a glance
| Retatrutide sizes | 10, 20, 30, 40 mg |
|---|---|
| Price | $79.99–$219.99 |
| Third-party testing | Freedom Diagnostics (stated); 'COA on request' |
| Ships from | USA (Orange, CA) |
| Shipping | Same day · free tracked over $150 |
| Payment methods | Visa, Mastercard, Amex, Discover, JCB, Apple Pay |
| Guarantee / refunds | Damaged/wrong/out-of-spec claims within 7 days |
| Best for | Buyers who want to deal with a disclosed US company |
Pros and cons
- Named legal entity and suite address
- Same-day dispatch before 3 pm EST and free shipment protection
- Broad card acceptance
- Page says both 'batch-specific COA' and 'COA on request'
- Only 7 days to file a claim; opened vials excluded
- Email-only support; no Trustpilot profile
Bottom line
Greatest Peptides is more transparent about who runs it than most vendors, but its testing documentation is less clear and its claims window is short.
Products and pricing
Retatrutide in 10, 20, 30 and 40 mg, $79.99–$219.99.
Testing
“99%+” with LC-MS identity and endotoxin screening claimed per batch; the footer says “Verified by Freedom Diagnostics”. The page also shows a “COA on request” badge, which conflicts with the batch-specific COA claim.
Shipping and payment
US fulfillment, same day for orders by 3 pm EST, free tracked shipping over $150, overnight available, free shipment protection. Visa, Mastercard, Amex, Discover, JCB and Apple Pay.
Policies and support
Damaged, wrong or out-of-spec items must be reported within 7 days of delivery; opened vials are excluded; a chargeback voids refund rights. Email support only. Greatest Peptides LLC, 1100 Town and Country Rd, Ste 1250, Orange, CA 92868.
Reputation
No Trustpilot profile found. Domain registered November 2025.
Alternatives to Greatest 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.