Vendor and compound
Thymosin Alpha-1 from PeptidePlugs
PeptidePlugs lists Thymosin Alpha-1 at $6.00 per mg, 17% under the $7.20 peer median. 2 third-party certificates for this compound from this vendor are on file, assayed by Freedom Diagnostics Testing, averaging 99.55% purity. The cheapest listed price for Thymosin Alpha-1 anywhere in the index is $3.90 per mg at Eternal Peptides.
All Thymosin Alpha-1 vendors · PeptidePlugs profile · scores 86.3 of 100, rank 9 · 2 certificates for this compound · verified 29 Aug 2026
What it costs
| Vial | Listed price | Per mg | vs peer median | Listing |
|---|---|---|---|---|
| 10 mg | $60 | $6.00 | -17% | Thymosin Alpha-1 10mg |
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.
What the laboratory found
| Lot | Assayed | Purity | Label → assayed | Laboratory | Record |
|---|---|---|---|---|---|
| Red Cap | 25 Jul 2026 | 99.2% | 10 mg → 10.18 mg | Freedom Diagnostics Testing | Open |
| SM-140-10 | 7 Jun 2026 | 99.89% | 10 mg → 11.29 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 Thymosin Alpha-1
| Vendor | Score | Per mg | Certificates for this compound |
|---|---|---|---|
| Next Gen Peptides | 93.8 | — | 2 |
| Ascend Science | 90.1 | $5.25 | 0 |
| Amino Club | 88.3 | $4.00 | 0 |
| Modern Aminos | 88.1 | $8.00 | 2 |
| Bench Grade Peptides | 86.8 | $12.10 | 0 |
| Polaris Peptides | 86.6 | $6.50 | 0 |
| Simple Peptide | 84.9 | $8.60 | 1 |
| Curo | 81.8 | $6.00 | 0 |
Ordered by overall evidence score. See every vendor listing Thymosin Alpha-1.
Questions
Is Thymosin Alpha-1 from PeptidePlugs third-party tested?
Yes. 2 certificates for Thymosin Alpha-1 from PeptidePlugs 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 Thymosin Alpha-1 cost at PeptidePlugs?
$6.00 per milligram, from 10 mg at $60. The peer median across every vendor we price for Thymosin Alpha-1 is $7.20 per mg, so this is -17% against the market. Prices are normalised per milligram so vials of different sizes compare fairly.
Is PeptidePlugs a good place to buy Thymosin Alpha-1?
PeptidePlugs scores 86.3 of 100 on the published rubric and ranks 9 overall, computed from its documentation rather than from opinion. For Thymosin Alpha-1 specifically it has 2 certificates on file. Eternal Peptides lists it cheaper at $3.90 per mg.