Disclosure: We earn a commission from vendors on this page. Rankings are based on objective criteria including price, COA availability, and reputation.
Best Glutathione Vendors of 2026
Ranked by Price, Purity, and Reputation
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Quick Comparison
1Nura PeptideCOA
10/101500mg$0.05/mg
2Ion PeptideCOA
9.7/10$0.05/mg
3Glacier AminosCOA
9.3/101500mg$0.05/mg
4Swiss ChemsShips WorldwideCOA
9/10600mg$0.05/mg
| Rank | Vendor | COA | Score | Doses |
|---|---|---|---|---|
| 1 | Nura Peptide | Yes | 10/10 | |
| 2 | Ion Peptide | Yes | 9.7/10 | |
| 3 | Glacier Aminos | Yes | 9.3/10 | |
| 4 | Swiss ChemsShips Worldwide | Yes | 9/10 |
Bulk Pricing
Per-vendor quantity breaks — pick a vial size to see the bulk price. Must purchase the full pack.
Ion PeptideCOA15% code thepeptidecatalog
as low as $0.0096/mg$112.501000mg × 10$0.011/mg → $0.0096/mg with code
View at Ion PeptideGlacier AminosCOA10% code thepeptidecatalog
as low as $0.032/mg$683.901500mg × 10$0.046/mg → $0.041/mg with code
View at Glacier AminosNura PeptideCOA25% code thepeptidecatalog
as low as $0.033/mg$657.001500mg × 10$0.044/mg → $0.033/mg with code
View at Nura PeptideCompare More Peptide Vendors
How We Score Vendors
Our scoring is based on three weighted factors:
Price Competitiveness (40%)
Normalized to cost per milligram for fair comparisons across vial sizes.
COA Availability (30%)
Third-party lab testing confirming purity, identity, and absence of contaminants.
Vendor Reputation (30%)
Community feedback, shipping reliability, customer service, and business track record.