TB-500
PreclinicalNot the whole protein — just its active 7-amino-acid fragment, sold to racehorses before athletes.
What it is
TB-500 is a short 7-amino-acid peptide, the active site of a larger natural protein called thymosin beta-4. People often call it 'thymosin beta-4,' but that's imprecise — most real clinical research used the full 43-amino-acid protein, while TB-500 in the bottle is the tiny fragment. No version is FDA-approved.
How it works
It borrows the parent protein's biology: helping cells move to injury sites, encouraging new blood vessels, dampening inflammation, and nudging wound healing. The fair question — whether a 7-amino-acid piece truly reproduces a 43-amino-acid protein's effects — is unresolved.
What people report
- ✦Muscle and soft-tissue recovery is the main community use
- ✦Plausible cell-migration and repair mechanism
- ✦Often stacked with BPC-157 as the 'wolverine stack'
- ✦Slower onset than BPC-157, effects building over weeks
Typical use
Typically cycled for several weeks during an injury or recovery period, often every few days.
Dosing reference
Community dosing is usually a few milligrams every few days. No approved dose exists.
Reference only — not a recommendation. Verify via primary sources.
Watch for
The fragment itself has zero controlled human trials. The full protein's key trials missed their endpoints: a neurotrophic-keratopathy study and a dry-eye study both failed to hit their marks, and nothing is approved anywhere. Treat mechanism as plausible, results as unproven.
Notes
It was first distributed for racehorse injury recovery in the 2000s, and WADA banned it that same decade — a veterinary past, not a deliberate human therapy program.
Reconstitution math for TB-500
Typical vial: 5mg dissolved in 2ml BAC water. Adjust to see the math.
Reconstitution Calculator
Understand the math — pick a peptide, see its info, and how reconstitution works.
BPC-157
Healing & recoveryThe repair peptide everyone in the gym talks about — powerful in rats, still unproven in humans.
BPC-157 is a short chain of 15 amino acids. It is not a natural hormone your body makes on its own. It was built in a lab as a fragment of a larger 'body protection compound' first found in human stomach juice in the 1990s. Vendors sell this engineered piece, not a natural sequence.
How it works (optional detail)
In animal studies, BPC-157 seems to nudge faster blood-vessel growth at injured spots, which is the body's first step in healing. It also appears to quiet inflammation. The idea is that by tickling repair pathways rather than ordering one single thing, it helps tendons, ligaments, and gut lining recover speedier than they would on their own.
Dosing reference: Common community dosing is a few hundred micrograms a day, usually injected near the site or into belly fat. There is no approved human dose.
Reconstitution math
Concentration: 2.500 mg/ml (5mg in 2ml)
To get 1mg, draw:
0.400 ml
≈ 40 units on a U-100 insulin syringe
This calculator shows how the arithmetic works using common vial sizes. It is an educational illustration — not a dosing recommendation. Always follow the specific product's instructions and verify with primary sources or a qualified professional.
Educational content — not medical advice.