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Best Thymosin Alpha-1 Vendors of 2026
Ranked by Price, Purity, and Reputation
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Quick Comparison
1EZ Peptides
10/10$52.20$58.00
10mg$5.22/mgCOA2Ion Peptide
9/10$35.70$42.00
5mg$7.14/mgCOA3BioLongevity Labs
8.9/10$129.97
10mg$13.00/mgCOA4Swiss ChemsShips Worldwide
8.8/10$63.99
5mg$12.80/mgCOA5Penguin Peptides
8.7/10$59.00
5mg$11.80/mgCOA6Limitless Biotech
8.6/10$57.79$67.99
10mg$5.78/mgCOA| Rank | Vendor | Price | Amount | $/mg | COA | Score | |
|---|---|---|---|---|---|---|---|
| 1 | EZ Peptides | $52.20$58.00 | 10mg | $5.22/mg | Yes | 10/10 | View10% OFF |
| 2 | Ion Peptide | $35.70$42.00 | 5mg | $7.14/mg | Yes | 9/10 | View15% OFF |
| 3 | BioLongevity Labs | $129.97 | 10mg | $13.00/mg | Yes | 8.9/10 | |
| 4 | Swiss ChemsShips Worldwide | $63.99 | 5mg | $12.80/mg | Yes | 8.8/10 | |
| 5 | Penguin Peptides | $59.00 | 5mg | $11.80/mg | Yes | 8.7/10 | |
| 6 | Limitless Biotech | $57.79$67.99 | 10mg | $5.78/mg | Yes | 8.6/10 | View15% OFF |
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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.