Disclosure: We earn a commission from vendors on this page. Rankings are based on objective criteria including price, COA availability, and reputation.
Best Thymosin Alpha-1 Vendors of 2026
Ranked by Price, Purity, and Reputation
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Quick Comparison
1Nura PeptideCOA
10/1010mg$8.50/mg
2Ascension PeptidesCOA
9.8/1010mg$7.10/mg
3Ion PeptideCOA
9.6/10$6.50/mg
4EZ PeptidesCOA
9.4/1010mg$5.80/mg
5Glacier AminosCOA
9.2/1010mg$6.40/mg
6Swiss ChemsShips WorldwideCOA
9/105mg$12.80/mg
| Rank | Vendor | COA | Score | Doses |
|---|---|---|---|---|
| 1 | Nura Peptide | Yes | 10/10 | |
| 2 | Ascension Peptides | Yes | 9.8/10 | |
| 3 | Ion Peptide | Yes | 9.6/10 | |
| 4 | EZ Peptides | Yes | 9.4/10 | |
| 5 | Glacier Aminos | Yes | 9.2/10 | |
| 6 | 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.
Ascension PeptidesCOA
as low as $3.19/mg$639.0010mg × 10$6.39/mg → $3.19/mg auto-applied
View at Ascension PeptidesGlacier AminosCOA10% code thepeptidecatalog
as low as $4.03/mg$575.9010mg × 10$5.76/mg → $5.18/mg with code
View at Glacier AminosIon PeptideCOA15% code thepeptidecatalog
as low as $4.14/mg$487.5010mg × 10$4.88/mg → $4.14/mg with code
View at Ion PeptideEZ PeptidesCOA10% code thepeptidecatalog
as low as $4.70/mg$522.0010mg × 10$5.22/mg → $4.70/mg with code
View at EZ PeptidesNura PeptideCOA25% code thepeptidecatalog
as low as $5.74/mg$765.0010mg × 10$7.65/mg → $5.74/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.