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 83.2 of 100, rank 11 · 2 certificates for this compound · verified 18 Aug 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 |
|---|---|---|---|
| Next Gen Peptides | 93.8 | — | 2 |
| Ascend Science | 90.1 | $0.040 | 2 |
| Amino Club | 88.3 | $0.040 | 0 |
| Modern Aminos | 88.1 | $0.090 | 1 |
| Origin Labs | 87.7 | — | 1 |
| Bench Grade Peptides | 86.8 | $0.050 | 1 |
| Polaris Peptides | 86.6 | $0.100 | 0 |
| PeptidePlugs | 86.3 | $0.030 | 2 |
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 83.2 of 100 on the published rubric and ranks 11 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.