Thymosin Beta-4
The full parent protein of TB-500, studied in tissue-repair and regenerative research.
Get told when a price moves or a lab test changes.
Observed median price
$130
Every observation
| Date | Observed |
|---|---|
| $91.24 | |
| $139.99 | |
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| $117.50 | |
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| $139.99 | |
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| $78.75 | |
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Not enough listings with 30 days of checks to summarise a change — 2 of 5 qualify so far.
5
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. Purity is not a grade. Purity vs grade
Understand this compound
What is Thymosin Beta-4?
In clinical trialsa.k.a. Tβ4, RGN-259 (ophthalmic formulation)The full-size repair protein that TB-500 is cut from — it helps cells migrate into wounds to patch them. Its real human trials are eye-drop versions for cornea and dry-eye disease, not injections.
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?
The science
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.
Current market
The Thymosin Beta-4 market
Every Thymosin Beta-4 listing we track — 5 in all. The standout picks first where the evidence supports them, then the full table, ranked by what a milligram really costs wherever the vendor published a strength we can read.
Open full marketTHYMOSIN BETA-4 (Tβ4) PEPTIDE LIQUID SPRAY 30ML BOTTLE (500MCG/ML, 15MG TOTAL) 30ML
Umbrella LabsC-
$130$8.67/mg
Lowest price per mg that isn't flagged as suspiciously cheap.
In stockChecked 11 hours ago
Thymosin Beta-4 10mg
Behemoth LabzC
$105$10.5/mg
The most recently re-verified listing on this market.
UnavailableChecked 10 hours ago
THYMOSIN BETA-4 (Tβ4) PEPTIDE POWDER (60 CAPSULES) (250MCG/CAPSULE, 15MG TOTAL BOTTLE)
Umbrella LabsC-
$150$10.00/mg
Ranked #2 of 3 listings by price per milligram.
In stockChecked 11 hours ago
Compare by real cost
Every Thymosin Beta-4 listing, cheapest per mg first
Sticker prices hide the size, so listings are ranked by what a milligram actually costs — with independently tested purity where it exists. All 5 are here: the last 2 are listings whose vendor never published a strength we can read, so they have no per-mg figure to sort on.
| # | Vendor | Size | Price | Per mg | Tested purity | Real $/active mg | |
|---|---|---|---|---|---|---|---|
| 1 | Umbrella Labs | 15mg total30ML each | $130 | $8.67/mg | — | $8.72/mgbest value | View |
| 2 | Umbrella Labs | 15mg total250MCG each | $150 | $10.00/mg | — | $10.1/mg | View |
| 3 | Behemoth LabzUnavailable | 10mg total | $105 | $10.5/mg | — | $10.6/mg | View |
| Listed, but not rankable — no published strength to price per mg | |||||||
| — | PurerawzUnavailable | 1 vial | $22 | no size published | — | — | View |
| — | Behemoth Labz | 1 vial | $52 | no size published | — | — | View |
Open the full Thymosin Beta-4 market
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. A vendor shown as Unavailable or Low stock is priced here but not currently buyable.
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
| Certificate | Manufacturer | Batch | Purity | Content / dose | Lab | |
|---|---|---|---|---|---|---|
 | Sports Technology Labs | 2025-03-10 | 99.42% | — | 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.
What the research says
Scientific evidence & regulatory status
What the published literature actually shows about Thymosin Beta-4 — separate from any vendor’s marketing. Each finding links to its paper. This is education, not medical or dosing advice.
Regulatory status
No FDA-approved drug
Not FDA-approved. FDA placed the thymosin beta-4 fragment sold as TB-500 in category 2 (significant safety risks) for compounding, stating it had identified no human exposure data; the nomination was later withdrawn. WADA prohibits thymosin-beta-4 and its derivatives at all times (S2.3).
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.
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.
General information, not legal or medical advice. VialGrade sells nothing and encourages no human use.
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.