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

The best-reviewed TB-500 seller we track holds a 5 star rating across more than 1,500 Trustpilot reviews, with full HPLC and mass-spec testing on its products. That is the bar. Plenty of sellers clear it, and this guide is about finding the ones that do.

TB-500 has no single approved manufacturer, so the seller you choose is what sets the quality. The good news is that the strongest 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, and how to check any seller 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.

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 TB-500 costs

Prices swing widely by seller and by vial size, and on its own price is a weak signal of quality. The 10 mg vial is the most common size to start with. Because price alone tells you so little, we weigh testing first and price second, which is how the sellers below are ordered.

The TB-500 sellers we trust most

Every seller below ships to the US, publishes third-party lab results, and has a full profile on our site. Tap any name to open its scorecard.

Pure Peptide Labs is the highest-rated TB-500 seller we track: a 5 star Trustpilot average across more than 1,500 reviews, with HPLC and mass-spec testing and US shipping. The strongest all-around default.

Certified Peptides pairs a 4.9 star rating from over 900 reviews with an ISO accredited testing lab, about as much third-party rigor as this market offers.

Verified Peptides lives up to its name with more than 400 public COAs, Janoshik testing, and a 4.9 star rating. The pick when you want to read the lab work before you buy.

Mile High Compounds runs a 7-point batch test on every lot and puts a scannable COA on each vial, with a 4.9 star rating to match.

Peptira leans into healing and recovery peptides like TB-500, tests through Freedom Diagnostics, and holds a 4.7 star rating. A strong mid-priced choice.

Thrive Peptides is a budget-friendly option some buyers mention, though it is not currently a PeptidesRated-scored vendor, so we cannot independently vouch for its testing.

Want the whole field? We rank every TB-500 seller we cover, with purity and testing for each, on our TB-500 vendor list.

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 to confirm a Janoshik, Finnrick, or Freedom Diagnostics result, or line every TB-500 seller up side by side on the comparison page. Stacking it with BPC-157? That pairing is common enough we broke it down in the Wolverine stack and 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?

Prices vary widely by seller and vial size, and on its own price is a weak signal of quality. The 10 mg vial is the most common starting size. Compare sellers on third-party testing first, since that is what protects the value of what you buy.

Which TB-500 seller is best?

It depends on what you weigh. For an all-around pick, Pure Peptide Labs rates highest with us, a 5 star average across more than 1,500 reviews. For lab transparency, Verified Peptides publishes over 400 public COAs. For accredited testing, Certified Peptides uses an ISO accredited lab. All ship to the US.

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.

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/vendors