BPC-157 vs Thymosin Alpha-1
BPC-157: Synthetic gastric peptide. Thymosin Alpha-1: Thymic immune peptide (thymalfasin). Per milligram, BPC-157 is cheaper right now (USD 0.500 vs USD 1.20 at the cheapest tested vendor). Thymosin Alpha-1 has stronger published evidence (grade B vs C). Prices per mg compare cost, not effect: the amounts used in studies differ between compounds.
BPC-157
A 15-amino-acid peptide derived from a protein in stomach juice. Many animal studies report faster healing of tendons, ligaments, muscle and the gut lining; there are almost no published human trials.
- What it is
- Synthetic gastric peptide
- Category
- Healing & recovery
- Status
- Not approved. FDA's compounding advisers recommended allowing it in July 2026, but pharmacies can't compound it until FDA finishes rulemaking; prohibited in sport.
- Cheapest
- USD 0.500 per mg (Uther)
- Median price
- USD 4.00 per mg
- Vendors
- 87 independently tested, 37 with a lab report
- Research
- Grade C: Mostly animal studies (13 papers)
- Studied as
- studied in people
- Reported side effects
- Neuropsychiatric events (preprint, LLM-curated clinical notes); Injection-site hypersensitivity (preprint, LLM-curated clinical notes); Gastrointestinal events (preprint, LLM-curated clinical notes)
Thymosin Alpha-1
A 28-amino-acid peptide from the thymus that boosts T-cell function. Used clinically as an immune modulator for hepatitis B and C and as a vaccine adjuvant.
- What it is
- Thymic immune peptide (thymalfasin)
- Category
- Inflammation & immune
- Status
- Approved in several countries as Zadaxin; not FDA-approved.
- Cheapest
- USD 1.20 per mg (BeiBangAn)
- Median price
- USD 5.00 per mg
- Vendors
- 68 independently tested, 15 with a lab report
- Research
- Grade B: Some human evidence (8 papers)
- Studied as
- studied in people
Cheapest tested vendors for BPC-157 and Thymosin Alpha-1
Lowest price per milligram at up to three independently tested vendors each. Rankings are by price only; open a vendor to see its lab results.
| Peptide | Vendor | Per mg |
|---|---|---|
| BPC-157 | Uther | USD 0.500 |
| HkRoids | USD 0.508 | |
| Peptides Book | USD 0.625 | |
| Thymosin Alpha-1 | BeiBangAn | USD 1.20 |
| LN Peptides | USD 1.20 | |
| Uther | USD 1.45 |
Questions people ask
What is the difference between BPC-157 and Thymosin Alpha-1?
BPC-157: Synthetic gastric peptide. Thymosin Alpha-1: Thymic immune peptide (thymalfasin). Per milligram, BPC-157 is cheaper right now (USD 0.500 vs USD 1.20 at the cheapest tested vendor). Thymosin Alpha-1 has stronger published evidence (grade B vs C). Prices per mg compare cost, not effect: the amounts used in studies differ between compounds.
Which is cheaper, BPC-157 or Thymosin Alpha-1?
BPC-157 is cheaper per mg: USD 0.500 for BPC-157 vs USD 1.20 for Thymosin Alpha-1 at the cheapest independently tested vendor. The median listing is USD 4.00 per mg for BPC-157 and USD 5.00 per mg for Thymosin Alpha-1.
Which is easier to find from a tested vendor, BPC-157 or Thymosin Alpha-1?
BPC-157 is sold by more independently tested vendors: 87 list BPC-157 (37 publish a lab report for it) and 68 list Thymosin Alpha-1 (15 with a lab report).
Which has more published research, BPC-157 or Thymosin Alpha-1?
BPC-157 is graded C (mostly animal studies) from 13 papers and Thymosin Alpha-1 is graded B (some human evidence) from 8 papers. Grades count studies of the exact compound only; they describe how much evidence exists, not which one is better.
Are BPC-157 and Thymosin Alpha-1 FDA approved?
BPC-157: Not approved. FDA's compounding advisers recommended allowing it in July 2026, but pharmacies can't compound it until FDA finishes rulemaking; prohibited in sport. Thymosin Alpha-1: Approved in several countries as Zadaxin; not FDA-approved.