Vendor and compound
Glutathione from ZC Labs
ZC Labs lists Glutathione at $0.020 per mg, 60% under the $0.050 peer median. 2 third-party certificates for this compound from this vendor are on file, assayed by Freedom Diagnostics Testing, averaging 99.94% purity. The cheapest listed price for Glutathione anywhere in the index is $0.020 per mg at Eternal Peptides.
All Glutathione 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 |
|---|---|---|---|---|
| 1500 mg | $36 | $0.024 | -52% | Glutathione 1500mg |
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 |
|---|---|---|---|---|---|
| ZCLa2608240407 | 26 Aug 2026 | 99.91% | 1500 mg → 1556.58 mg | Freedom Diagnostics Testing | Open |
| ZCLa2608250018 | 26 Aug 2026 | 99.98% | 1500 mg → 1541.96 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 Glutathione
| Vendor | Score | Per mg | Certificates for this compound |
|---|---|---|---|
| Origin Labs | 89.1 | — | 1 |
| Next Gen Peptides | 87.7 | — | 4 |
| Amino Club | 86.1 | $0.040 | 3 |
| PeptidePlugs | 82.6 | $0.030 | 2 |
| Modern Aminos | 79.7 | $0.090 | 1 |
| Bench Grade Peptides | 79.4 | $0.050 | 1 |
| One Aminos | 78 | $0.070 | 1 |
| Simple Peptide | 77.2 | $0.050 | 1 |
Ordered by overall evidence score. See every vendor listing Glutathione.
Questions
Is Glutathione from ZC Labs third-party tested?
Yes. 2 certificates for Glutathione 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 Glutathione cost at ZC Labs?
$0.020 per milligram, from 1500 mg at $36. The peer median across every vendor we price for Glutathione is $0.050 per mg, so this is -60% against the market. Prices are normalised per milligram so vials of different sizes compare fairly.
Is ZC Labs a good place to buy Glutathione?
ZC Labs scores 87.2 of 100 on the published rubric and ranks 3 overall, computed from its documentation rather than from opinion. For Glutathione specifically it has 2 certificates on file. Eternal Peptides lists it cheaper at $0.020 per mg.