Vendor and compound
Retatrutide from ZC Labs
ZC Labs lists Retatrutide at $2.90 per mg, 61% under the $7.40 peer median. 5 third-party certificates for this compound from this vendor are on file, assayed by Freedom Diagnostics Testing, averaging 99.83% purity. That is the cheapest listed price for Retatrutide in the index.
All Retatrutide vendors · ZC Labs profile · scores 87.2 of 100, rank 3 · 5 certificates for this compound · verified 5 Nov 2026
What it costs
| Vial | Listed price | Per mg | vs peer median | Listing |
|---|---|---|---|---|
| 10 mg | $28.99 | $2.90 | -61% | ZC-RT 10-30mg |
Read from the vendor’s own store and normalised per milligram, because a smaller vial at a lower sticker price is usually the dearer peptide. Codepepindex· 10% off applies at checkout.
What the laboratory found
| Lot | Assayed | Purity | Label → assayed | Laboratory | Record |
|---|---|---|---|---|---|
| ZCLa2608250019 | 26 Aug 2026 | 99.8% | 10 mg → 10.89 mg | Freedom Diagnostics Testing | Open |
| ZCLa2607301115 | 4 Aug 2026 | 99.72% | 15 mg → 18.85 mg | Freedom Diagnostics Testing | Open |
| ZCLa2607160042 | 19 Jul 2026 | 99.89% | 15 mg → 18.56 mg | Freedom Diagnostics Testing | Open |
| ZCLa2606080081 | 9 Jun 2026 | 99.89% | 15 mg → 16.28 mg | Freedom Diagnostics Testing | Open |
| ZCLa2606080082 | 9 Jun 2026 | 99.84% | 30 mg → 31.01 mg | Freedom Diagnostics Testing | Open |
Freedom Diagnostics Testing publishes a lookup, so these reports can be confirmed at the laboratory rather than taken from the vendor. How to check one.
Other vendors selling Retatrutide
| Vendor | Score | Per mg | Certificates for this compound |
|---|---|---|---|
| Origin Labs | 89.1 | — | 5 |
| Next Gen Peptides | 87.7 | $4.00 | 16 |
| Amino Club | 86.1 | $7.00 | 3 |
| Bench Grade Peptides | 79.4 | $3.90 | 4 |
| Hydro Research Peptides | 78.7 | — | 1 |
| Stealth Research Labs | 78.1 | $7.00 | 1 |
| One Aminos | 78 | $7.00 | 2 |
| Koi Peptides | 75.1 | $9.00 | 0 |
Ordered by overall evidence score. See every vendor listing Retatrutide.
Questions
Is Retatrutide from ZC Labs third-party tested?
Yes. 5 certificates for Retatrutide from ZC Labs are on file, signed by Freedom Diagnostics Testing. Each names a lot, prints the assayed mass against the labelled mass, and links to the document it was read from. Freedom Diagnostics Testing also publishes a lookup, so the report can be confirmed at the laboratory rather than taken from the vendor.
How much does Retatrutide cost at ZC Labs?
$2.90 per milligram, from 10 mg at $28.99. The peer median across every vendor we price for Retatrutide is $7.40 per mg, so this is -61% against the market. Prices are normalised per milligram so vials of different sizes compare fairly.
Is ZC Labs a good place to buy Retatrutide?
ZC Labs scores 87.2 of 100 on the published rubric and ranks 3 overall, computed from its documentation rather than from opinion. For Retatrutide specifically it has 5 certificates on file.