Vendor and compound
Tirzepatide from ZC Labs
ZC Labs lists Tirzepatide at $1.90 per mg, 72% under the $6.75 peer median. 2 third-party certificates for this compound from this vendor are on file, assayed by Freedom Diagnostics Testing, averaging 99.55% purity. That is the cheapest listed price for Tirzepatide in the index.
All Tirzepatide vendors · ZC Labs profile · scores 87.2 of 100, rank 3 · 2 certificates for this compound · verified 5 Nov 2026
What it costs
| Vial | Listed price | Per mg | vs peer median | Listing |
|---|---|---|---|---|
| 10 mg | $18.99 | $1.90 | -72% | ZC-TZ 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 |
|---|---|---|---|---|---|
| ZCLa2607290144 | 1 Aug 2026 | 99.44% | 10 mg → 11.69 mg | Freedom Diagnostics Testing | Open |
| ZCLa2606080088 | 9 Jun 2026 | 99.66% | 40 mg → 42.81 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 Tirzepatide
| Vendor | Score | Per mg | Certificates for this compound |
|---|---|---|---|
| Origin Labs | 89.1 | — | 1 |
| Next Gen Peptides | 87.7 | $2.00 | 12 |
| Amino Club | 86.1 | $2.00 | 0 |
| Bench Grade Peptides | 79.4 | $4.50 | 3 |
| Hydro Research Peptides | 78.7 | $8.50 | 6 |
| Stealth Research Labs | 78.1 | $4.50 | 1 |
| One Aminos | 78 | $5.00 | 1 |
| Koi Peptides | 75.1 | $9.00 | 0 |
Ordered by overall evidence score. See every vendor listing Tirzepatide.
Questions
Is Tirzepatide from ZC Labs third-party tested?
Yes. 2 certificates for Tirzepatide 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 Tirzepatide cost at ZC Labs?
$1.90 per milligram, from 10 mg at $18.99. The peer median across every vendor we price for Tirzepatide is $6.75 per mg, so this is -72% against the market. Prices are normalised per milligram so vials of different sizes compare fairly.
Is ZC Labs a good place to buy Tirzepatide?
ZC Labs scores 87.2 of 100 on the published rubric and ranks 3 overall, computed from its documentation rather than from opinion. For Tirzepatide specifically it has 2 certificates on file.