N° 002 · The Directory

TB-500

Synthetic 7-amino-acid fragment of thymosin beta-4 - half of the Wolverine blend.

A-Tier Recovery Rx via compounding

For: Soft-tissue recovery and injury repair
Form: SubQ injection (2-2.5 mg)
Dose: 2-2.5 mg, 2x / week
Cycle: 4-6 week load, then weekly
Safety: Avoid with cancer history
Legal: Research peptide, not FDA-approved

Bottom line: A research peptide often stacked with BPC-157 for soft-tissue recovery. Animal data only. A doctor-and-COA decision, not a casual buy.

Safety at a glance

Status: Not FDA-approved; research peptide.
Evidence: Animal data + anecdote; no human trials.
Do not use if: you have a cancer history - it promotes cell growth and new blood vessels.
Not medical advice - decide this with a licensed physician.

What it does - plain English

TB-500 is a synthetic peptide (a tiny lab-made chain of amino acids, the building blocks of protein) based on a 7-amino-acid segment of thymosin beta-4 - a protein your body already makes that helps cells travel to injury sites and rebuild damaged tissue. It promotes angiogenesis (new blood-vessel growth in damaged tissue), reduces inflammation, and helps cells reach where they need to go to heal.

The peptide community pairs it with BPC-157 in the "Wolverine blend" - the most-discussed recovery combo on the internet. TB-500 is the cell-migration peptide. BPC-157 is the structural-repair peptide. Together they cover both halves of the healing process - at least in the animal studies.

Important caveat: human clinical trials are sparse compared with BPC-157. The animal evidence is strong. The human evidence is thin. Go in knowing the difference.

What people use it for

An A-tier recovery peptide, often stacked with BPC-157. Where people use it:

See the full TB-500 dosing protocol ->

Status

A-tier for recovery stacking - by user-reported consensus within the peptide community, not by formal trial evidence. The animal data is solid across cardiac repair, soft-tissue healing, and corneal wound healing. Human RCTs (randomized controlled trials - the gold standard of evidence) barely exist for TB-500 in healthy adults.

If you're researching the Wolverine combo, TB-500 is the less-studied half. The evidence base for BPC-157 is deeper. Go in with eyes open about the gap between animal studies and human data.

Legal status

TB-500 is not FDA-approved for human use. It is also banned by WADA (the World Anti-Doping Agency - the body that sets drug rules for Olympic and professional sports). If you compete in any sport with drug testing, do not use it.

It sits in the same gray-zone "research peptide" category as BPC-157. Compounding pharmacies do dispense it via prescription in some states - most don't. The safest legal path is a doctor's prescription through a compounding pharmacy that covers it. Most people researching this topic are using the gray-zone research-vendor route instead.

Where to source

Same rules as BPC-157: COA (Certificate of Analysis - the lab report a peptide vendor should give you proving the bottle contains what they say) or no buy. Full stop.

Two paths exist. Compounding pharmacy via telehealth with a doctor's prescription is the legal route - each batch comes with a COA, the product is sterile, and you have some regulatory backstop. Research peptide vendors with third-party batch testing are the gray-zone route - the peptide may be high quality, but you have no consumer protection.

What to skip: pre-mixed "Wolverine blend" vials from gym-bro vendors with no COA and no batch testing. The mix-and-match concept isn't the problem. Zero provenance is the problem. Buy peptides one at a time, with paperwork per peptide.

New to peptides? Start with the foundations ->

Two studies worth reading

01

Cardiac repair - the foundational mechanism paper

Smart et al., Nature

Researchers showed TB-500 helps damaged adult hearts grow new heart-muscle cells in mice after injury. The study that got TB-500 onto the recovery-community radar. Evidence is in animals, not humans - but the mechanism it describes (activating dormant repair cells) is the reason the compound gets taken seriously.

02

Mechanism review - wound healing and angiogenesis

Crockford et al., Annals of the New York Academy of Sciences

A review covering why thymosin beta-4 - and by extension TB-500 - helps tissue heal. The two mechanisms covered: new blood-vessel growth in damaged areas (angiogenesis), and reduced inflammation at the injury site. Useful for understanding the "why" behind what users report.

Watch: Huberman on peptides (June 2026)

TB-500 (thymosin beta-4) shows up in the June 2026 episode as the common repair-stack partner to BPC-157, noting that because it does not touch the growth-hormone pathway it is generally framed as lower tumor risk than the GH peptides - though still without human trials.

Source: Huberman Lab - Peptides: The Science, Uses & Safety (Dr. Abud Bakri). See our full decode of what he says about every peptide.

From the Editor

My read after going through the literature: TB-500 is the "second peptide" in the Wolverine blend conversation, not the lead. BPC-157's evidence base is deeper and longer. If you're stacking, go in knowing you're adding a less-studied compound to a moderately-studied one. That's not a reason to skip it - it's a reason to calibrate expectations.

What I'd tell a friend asking about the Wolverine blend: get the BPC-157 protocol from a sports-med doc or telehealth provider first. If they're comfortable adding TB-500, ask which compounder they use, request a COA per peptide, and start from there. Single-peptide bottles from a legitimate compounder beat any pre-mix that can't show you paperwork per ingredient.

What I'd skip: any "5-peptide healing stack" sold as a single bottle without COAs per ingredient. That's where vendors hide quality problems. The stack concept is not the issue. The sourcing discipline is the whole game.

Your next step

How to vet a source Find your fit · 2-min quiz

Last reviewed · 2026·06·04 · Status reviewed weekly