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Synthetic peptide
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Thymosin Beta-4

Recovery & healingImmune & thymic

A naturally occurring 43-amino-acid actin-sequestering protein of the beta-thymosin family.

Thymosin B4TB-4Timbetasin

Observed median price

$91

0%

4

Active listings

1 · 99.4%

Independent lab tests

$22–$150

Observed price range

4

Known aliases

Read from the certificate, not re-measured by VialGrade.

Understand this compound

What is Thymosin Beta-4?

In clinical trialsa.k.a. Tβ4, RGN-259 (ophthalmic formulation)

The full parent protein of TB-500, studied in tissue-repair and regenerative research.

Recovery & healingImmune & thymic
⚠

Good to know: Clinical evidence applies specifically to topical eye-drop formulations studied by RegeneRx; it does not establish safety or efficacy for systemic or injectable use.

How does Thymosin Beta-4 work?

A naturally occurring 43-amino-acid actin-binding protein that regulates cell migration, angiogenesis, and inflammation, promoting keratinocyte and fibroblast movement into wound sites.

Mechanism of action from published research — how the molecule behaves, not a claim about any product or any human-use effect.

What is Thymosin Beta-4 researched for?

Studied for corneal wound healing, dry eye disease, and cardiac and dermal tissue repair.

  • Recovery & healingStudied in tissue-repair research — tendon, ligament, muscle, and wound-healing models.
  • Immune & thymicStudied in immune-modulation and thymic-function research.
How far has the research gone?

In clinical trials — a topical ophthalmic formulation (RGN-259) has completed Phase 2/3 trials for dry eye and neurotrophic keratitis and holds FDA Orphan Drug status; systemic/injectable use remains preclinical.

Where the science stands — an approved drug is not the same as the research-grade material a vendor sells, which is unregulated regardless.

What should I check before buying?
  • Independent purity. Look for a third-party COA (Janoshik or MZ) showing a measured purity — not just a number the vendor typed.
  • Batch match. The strongest evidence is a certificate for the exact batch you’ll receive, attributed to this vendor — check the cross-verification on the listing.
  • Vendor reputation. See how the vendor is talked about in the community before trusting a new name.

Research context only — VialGrade never gives dosing, medical, or human-use guidance.

US legal statusBanned in drug-tested sport (WADA/USADA)

Research-use-only — not FDA-approved

Sold “for research use only,” this compound is not FDA-approved for human use and has not been evaluated for safety, purity, or sterility in people. It is generally not a scheduled controlled substance, so buying it as a research chemical is typically not itself a drug crime — but marketing or using it as a drug is not lawful, and it is not a dietary supplement.

Read the full US legal overview →

General information, not legal or medical advice. VialGrade sells nothing and encourages no human use.

Compare by real cost

Cheapest Thymosin Beta-4, by price per mg

Vials come in different sizes, so the sticker price lies. This ranks every listing by what a milligram actually costs — with independent test purity where we have it.

#VendorSizePricePer mgTested purityReal $/active mg
1Umbrella Labs15mg total30ML each$130$8.67/mg—$8.72/mgbest valueView
2Umbrella Labs15mg total250MCG each$150$10.00/mg—$10.1/mgView

Real $/active mg divides the price-per-mg by the measured purity — the honest cost of the actual peptide, so a 90%-pure vial isn’t compared as if it were 99%. Too cheap? flags a listing far below the market rate — often underdosing or a fake, not a deal. The crown marks the cheapest non-outlier; best value marks the lowest real cost per active mg.

Current market

All Thymosin Beta-4 listings

Thymosin Beta-4 1 vialPureRawz
C-Grade C-
Recovery & healingImmune & thymic

$22

Vendor catalog Compound: 1 COALive data

Availability

In stock

Last checked

8 days ago

Commonly researched together

Often stacked with Thymosin Beta-4

Compounds the research community frequently discusses alongside Thymosin Beta-4. Not a protocol or a recommendation — a starting point for what to read about next.

BPC-157

Synthetic peptide

$61median
Recovery & healingGut health

One of the most-discussed peptides in tissue-recovery and gut-health research. Preclinical studies have looked at connective-tissue and gastrointestinal models. The classic partner to TB-500.

Independent testing

Thymosin Beta-4 — independent lab tests

Real, publicly verifiable third-party tests. Purity is read from the certificate itself. A test reflects one lab’s result for one submitted batch — not a guarantee that every vial matches.

How does this data get here?

Every record below is a real certificate of analysis, gathered two ways: from the public verification feeds that independent labs (like Janoshik) publish, and from the certificates vendors post on their own product pages. We open each certificate document and read the measured purity, content, batch, and date directly off it — a scraper can’t read a number printed inside an image, so this is done by machine vision, then recorded here with a link back to the original.

Nothing here is typed in by a vendor or invented by us. Where a certificate is missing, we say so rather than filling the gap.

We re-check the lab feed, too. A “still listed” tag means the certificate is currently public in Janoshik’s database — we re-verify against the live feed and stamp the date. If a cert is later pulled, the tag flips. It’s a freshness check on the same source, not a second independent opinion.

What a certificate does & doesn’t prove

Three different questions. Purity (“how clean?”), identity (“is it the right molecule?”, a mass-spec test), and content (“did I get the labeled mg?”) are separate. A vial can be 99% pure and still be the wrong peptide, or the right peptide underdosed. We flag the measured dose against the label above; underdosing is the most common real fraud.

Who submitted the sample matters. Most of these are vendor-submitted — the seller chose which vial to send, so one good certificate doesn’t prove every batch is the same. The gold standard is a blind test, where a buyer sends a vial they bought as a normal customer. Same label doesn’t prove same product; same batch number doesn’t prove same batch.

99.4%

highest tested purity

CertificateManufacturerBatchPurityContent / doseLab
Certificate of analysisSports Technology Labs2025-03-1099.42%—MZ Biolabs View

Tested batches

Batch test records for Thymosin Beta-4

The full test history for one batch — who picked the sample, who tested it, and what came back. It describes the vials that were tested, never every vial they sold.

All batch records

Independent lab reports

Batch 2025-03-10

Sports Technology Labs

1 lab test, no disagreements

Open the record

Research notes aren’t product proof

Research summaries describe published literature and market data only. They do not establish the identity, quality, safety, or legal status of any listed physical product.