Where can I buy TB-500 that is third-party tested?

PepEvolution's best-sourced vendor for TB-500 is BioLongevity Labs, ranked by Source Match (vendor grade times batch-matched independent COA freshness). Vetted options with a COA on file: BioLongevity Labs (vendor grade 83, band A, an affiliate partner (disclosed)); Chameleon Peptides (vendor grade 83, band A); Midwest Peptide (vendor grade 81, band A, an affiliate partner (disclosed)). Affiliate links are disclosed and never influence grades or ranking.

Home›Rankings›TB-500

RecoveryPreliminary grade

TB-500

Thymosin Beta-4 fragment

BPC-157’s common partner for systemic tissue repair, widely sourced, but the human evidence is thin.

Verdict, C · Emerging / Mixed

Decent availability and a reasonable safety profile, but the human data is thin and a theoretical proliferation concern keeps it out of A/B territory. Viable for the informed; pair sourcing with a fresh COA.

PepScore / 100

CEmerging / Mixed

How we compute this →

Overview

TB-500 is a synthetic fragment associated with thymosin beta-4, used for systemic tissue repair and often stacked with BPC-157. Sourcing is broadly available and frequently COA-tested, but the published human evidence base is limited.

TB-500 dosage, what the research shows →

Doses used in published studies, reconstitution math, half-life and safety notes. Cited, educational.

PepScore Breakdown, the four axes

Evidence

35% weight

38/100

How strong is the published human science?

Human data depth12/40

Regulatory & registry status8/30

Reproducibility & consistency12/20

Mechanism characterized in humans6/10

Sourcing & COA

30% weightOur moat

81/100

Can a buyer obtain an independently-verified, high-purity version?, our proprietary layer.

Independent + portal-verifiable testing29/35

Method transparency (HPLC + MS + endotoxin/sterility, methods stated)20/25

Lot-matched + recent20/25

Independent corroboration12/15

Safety & Risk

25% weight

71/100

What is the real-world harm potential?

Documented AEs / toxicity30/40

Contraindication breadth18/25

Regulatory warnings12/20

Therapeutic index / margin11/15

Practicality

10% weight

79/100

How easy is it to actually run a verified version?

Verified-source availability30/35

Cost / value per cycle18/25

Reconstitution & administration20/25

Storage & stability11/15

Sources & Citations

Every claim cites a primary source. Citations are machine-audited against NCBI, see methodology.

→Thymosin beta-4 and tissue repair (PubMed)

Best-Sourced Vendor

affiliate

BioLongevity Labs

Vendor 83 · A

Strong vendor grade (A) and the best verified supply right now for TB-500, batch-matched independent COA freshness 95%.

Code PEPTIDE15, 15% off

Visit BioLongevity Labs ↗

Ranked by Source Match = Vendor Grade × batch-COA freshness. Affiliate status is never an input to any grade, and a paying vendor never outranks a non-paying one on a tie.How this works →

Want a clinical path?

Talk to a licensed provider about TB-500 and whether it's appropriate for your situation.

Talk to a Provider ↗

Telehealth. Not medical advice, for educational purposes.

PepScore63/100 · C

Last gradedJune 28, 2026

Next re-grade triggerA registered human trial would lift Evidence; a fresh batch COA sweep would firm up Sourcing.

TB-500 Dosage Guide Price Index Vendor Grades Providers COA Lookup All Rankings

Get the PepEvolution Dispatch

Monthly COA findings, vendor changes, and new grades. Research/educational only, no spam.

Educational only, not medical advice. PepScore is an educational research grade, not a prescription or dosing recommendation. Some vendor links are affiliate links, this never affects grades. Consult a licensed healthcare provider before using any compound.