In-stock listings first, sorted by price per milligram. Testing and transparency signals are shown separately from price.
Methodology: how we rank.
Thymosin Alpha 1 - KIT (10 vials) 50mg
Total: $579.95
Listing: Thymosin Alpha 1 - KIT (10 vials) 50mg
Product URL: Open vendor page →
Last verified:
COA: No public COA found
Thymosin Alpha 1 (10MG)
Total: $78.00
Listing: Thymosin Alpha 1 (10MG)
Product URL: Open vendor page →
Last verified:
COA: No public COA found
Thymosin Alpha 1 - 1vial 5mg
Total: $63.99
Listing: Thymosin Alpha 1 - 1vial 5mg
Product URL: Open vendor page →
Last verified:
COA: No public COA found
Thymosin Alpha-1, 10mg vial
Total: $149.00
Listing: Thymosin Alpha-1, 10mg vial
Product URL: Open vendor page →
Last verified:
COA: No public COA found
Thymosin Alpha-1, 5mg vial
Total: $81.00
Listing: Thymosin Alpha-1, 5mg vial
Product URL: Open vendor page →
Last verified:
COA: No public COA found
Some links are affiliate links. We may earn a commission at no extra cost to you. Sort: in-stock items first, then by lowest price per milligram within each bucket.
"Verified" marks vendors with at least one independent third-party purity test for this peptide, aggregated from Finnrick Analytics. "No test on file" means we do not have a third-party test on record — not a claim that the product is untested.
Vial sizes vary across vendors. A 10mg vial at $90 is cheaper per milligram than a 5mg vial at $50, even though the smaller vial has a lower sticker price. We normalize every listing to dollars per milligram so cross-vendor comparisons are apples-to-apples.
Format matters too. Nasal sprays, oral capsules, and lyophilized vials are not interchangeable on a $/mg basis — bioavailability, dosing, and effective concentration differ. Format is shown as a badge on every row so you can filter to one delivery method before comparing prices.
Peptides in the same research category with at least one tracked vendor offer.