Peptide ChooserTB-500 (thymosin beta-4 fragment 17-23)
Not approvedResearch-useChecked 31 Oct 2026
Not approved: its nomination for pharmacy compounding was withdrawn. FDA source, 19 Oct 2026. Our hair growth and recovery and joints pages list it. The lowest price at the 10 shops shown below is $1.28/mg (Go Alpha Labs (AlphaLabs Peptides)), checked 19 Oct 2026.
Evidence by goal
What each goal page that lists it says, word for word, with its sources. The evidence rating comes from a goal page's checked options table; a goal without one shows "Not rated".
| Goal | Evidence in people | What the goal page says |
|---|---|---|
| Hair growthInjectable peptides sold for hair | None found in people | Vials from research-use shops, meant to be injected. No human evidence for hair. |
| Recovery and jointsTB-500 | Not rated | A copy of a natural repair protein, sold alongside BPC-157. Same July 2026 review, same proposal.2 |
Where it is sold
The 10 shops in the price window on our goal pages, each with its cheapest listing by price per mg, most checks first. Research-use sellers; we do not link to them. Prices checked 31 Oct 2026.
| Shop | Size | Price | Per mg | Checks |
|---|---|---|---|---|
| Iron Aminos | 10 mg | $34.99 | $3.50/mg | 4 of 5 checksLab reports: yesNo FDA letter: yesCompany found: yesLegal pages: noFresh prices: yes |
| Step One Ventures | 10 mg | $36.00 | $3.60/mg | 4 of 5 checksLab reports: yesNo FDA letter: yesCompany found: yesLegal pages: noFresh prices: yes |
| IDUN Peptides | 100 mg | $299.99 | $3.00/mg | 4 of 5 checksLab reports: yesNo FDA letter: yesCompany found: yesLegal pages: noFresh prices: yes |
| Go Alpha Labs (AlphaLabs Peptides) | 30 mg | $38.49 | $1.28/mg | 3 of 5 checksLab reports: yesNo FDA letter: yesCompany found: noLegal pages: noFresh prices: yes |
| Southern Aminos | 10 mg | $33.00 | $3.30/mg | 3 of 5 checksLab reports: yesNo FDA letter: yesCompany found: noLegal pages: noFresh prices: yes |
| Rocky Mountain Compounds | 10 mg | $41.25 | $4.12/mg | 3 of 5 checksLab reports: yesNo FDA letter: yesCompany found: noLegal pages: noFresh prices: yes |
| Lost Coast Aminos | 10 mg | $24.00 | $2.40/mg | 3 of 5 checksLab reports: yesNo FDA letter: yesCompany found: noLegal pages: noFresh prices: yes |
| Panda Peptides | 10 mg | $39.99 | $4.00/mg | 3 of 5 checksLab reports: yesNo FDA letter: yesCompany found: noLegal pages: noFresh prices: yes |
| Chimera Peptides | 100 mg | $204.00 | $2.04/mg | 2 of 5 checksLab reports: noNo FDA letter: yesCompany found: noLegal pages: noFresh prices: yes |
| NuScience Peptides LLC | 10 mg | $39.99 | $4.00/mg | 1 of 5 checksLab reports: noNo FDA letter: noCompany found: noLegal pages: noFresh prices: yes |
Price per mg is the price divided by the stated amount. Checks are facts we hold about the seller, not a safety or quality grade. How we rate
FDA warning letters
Our letters list is by company, not by substance. The letters page lists all 172, each with its subject and a link to fda.gov; filter it by a company name.
Compared with: BPC-157 vs TB-500, GHK-Cu vs TB-500
Sources
- FDA, status of TB-500, 19 Oct 2026: https://www.fda.gov/drugs/human-drug-compounding/certain-bulk-drug-substances-use-compounding-may-present-significant-safety-risks
- FDA Briefing Document, Pharmacy Compounding Advisory Committee meeting, 23 and 24 Jul 2026 (BPC-157, TB-500, MOTS-c, epitalon): https://www.fda.gov/media/193342/download