Best TB-500 Suppliers in 2026: Tested, Priced, and Compared

We priced every TB-500 seller we could find, all 59 of them, and the first thing that jumps out is the spread. The same compound, the same 10 mg vial, runs $2.97 per milligram at the cheapest vendor and a little over $19 at the priciest. A 6x gap on an identical molecule.

That spread comes down to one thing: TB-500 has no single approved manufacturer, so the seller you choose is what sets the quality. The good news is that the best sellers are easy to spot once you know the signals. The one that matters most: buy from a seller that publishes a real third-party certificate of analysis you can read before you pay.

Here is who clears that bar, what they charge, and how to check any of them yourself.

What you are actually buying

TB-500 is the lab-made version of the active stretch of thymosin beta-4, a protein your cells lean on to build and repair tissue. That is the reason people run it for soft-tissue and tendon recovery.

Most of the research so far is preclinical, animal and cell studies, with human data still early. That is useful context to have going in. For the mechanism and the studies in detail, we went deep in our [TB-500 guide](/blog/tb-500-complete-guide).

The legal picture in 2026

TB-500 is sold as a research chemical and is still awaiting FDA approval, which is the norm for most research peptides today.

Two dates matter this year. On July 23, the FDA compounding advisory committee takes up TB-500 alongside BPC-157, KPV, and MOTS-c, and a favorable vote would finally hand compounding pharmacies a legal path to make it. The public comment window runs through July 9. And if you compete in anything drug-tested, the World Anti-Doping Agency bans thymosin beta-4 year round, in and out of season.

What 59 sellers charge

We priced all of them. TB-500 lands between $2.97 and just over $19 per milligram, with the typical seller around $7. The 10 mg vial is the default, stocked by 47 of the 59. The cheapest is Pure Health Peptides at $2.97 with US shipping. Price is the easy part to compare. Testing is what gives you confidence, so that is where the rankings below start.

The sellers worth your money

After weighing testing, price, shipping, and track record, here is where we would actually send people.

Peptidology is our highest-rated TB-500 seller right now. US shipping, independent third-party COAs, and at $5.70 per milligram it sits mid-pack on price while topping our scoring everywhere else. The safe default.

Verified Peptides is the value play. $4.50 per milligram, independent COAs, ships domestically, and a 4.9 Trustpilot average across more than 300 reviews. The cheapest seller we recommend with zero hesitation.

Panda Peptides goes lower still at $4.00 per milligram, tests through Janoshik, and ships in the US. It scores a notch under the top two in our comparison, so we slot it just behind them, but for the price it is hard to argue with.

Orbitrex Peptides and Atomik Labz round out the top tier, both near $6 per milligram with independent testing and US shipping. Two more solid, well-tested options.

Peptira at $4.90 publishes its Freedom Diagnostics COAs openly, the kind of lab transparency we wish more sellers copied.

The full ranked list, with the lab and the testing detail behind every placement, lives on our [vendor comparison](/compare-providers).

What a great TB-500 seller looks like

The sellers worth coming back to share a handful of habits. They publish a certificate of analysis for the exact batch, from a lab you can look up, and let you read it before you buy. They price clearly per milligram, so a 10 mg vial is easy to weigh against a 5 mg one. They ship to the US and pack cold. And they stand behind orders with a real refund policy. Find those four together and you have a keeper.

Paste a batch number into our [COA checker](/coa) to confirm a Janoshik, Finnrick, or Freedom Diagnostics result, or line every TB-500 seller up side by side on the [comparison page](/compare-providers). Stacking it with BPC-157? That pairing is common enough we broke it down in [the Wolverine stack](/blog/wolverine-stack-bpc157-tb500) and [BPC-157 vs TB-500](/blog/bpc-157-vs-tb-500).

Common questions

Is TB-500 legal in 2026?

TB-500 is still awaiting FDA approval, so it sells as a research chemical for lab use, and compounding pharmacies cannot dispense it to patients in 2026. The July 23 FDA advisory meeting could change that.

How much does TB-500 cost?

Across the 59 sellers we track, $2.97 to about $19 per milligram, clustering near $7. The standard 10 mg vial is what 47 of them stock.

Which TB-500 seller is best?

It depends on what you weigh. For an all-around safe pick we rank Peptidology first. For value, Verified Peptides at $4.50 per milligram. For the lowest price with real testing, Panda Peptides at $4.00. All three ship to the US and publish independent COAs.

How do I know a TB-500 COA is real?

It should come from an independent lab you can look up, like Janoshik, Finnrick, or Freedom Diagnostics, and match the batch number on your vial. You can confirm one free in our [COA checker](/coa).

Sources

FDA, Pharmacy Compounding Advisory Committee meeting, July 23 to 24, 2026: https://www.fda.gov/advisory-committees/advisory-committee-calendar/july-23-24-2026-meeting-pharmacy-compounding-advisory-committee-07232026

Thymosin Beta-4 and TB-500 in Tissue Healing, Regeneration, and Musculoskeletal Repair: A Scoping Review (2026): https://doi.org/10.3390/app16126202

First-in-human, randomized phase I study of recombinant human thymosin beta-4: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8419156/

World Anti-Doping Agency 2026 Prohibited List: https://www.wada-ama.org/en/prohibited-list

PeptidesRated vendor comparison and pricing data: https://peptidesrated.com/compare-providers