TB-500
Thymosin Beta-4 · TB4 · Tβ4
A synthetic fragment of Thymosin Beta-4, studied for cell migration and tissue repair. Often logged alongside BPC-157. Note that published human trials used full-length Thymosin Beta-4, not this fragment.
At a glance
- Category
- Healing & Recovery
- Half-life
- Not characterised
- Typical vial sizes
- 2 mg · 5 mg · 10 mg
Concentration by water volume
Pure arithmetic: the vial strength divided by the water added. The dose itself comes from your clinician, pharmacy, product instructions, or research protocol — enter it in the calculator below.
| Vial | Water added | Concentration | Per U-100 unit |
|---|---|---|---|
| 2 mg | 1 mL | 2 mg/mL | 20 mcg |
| 2 mg | 2 mL | 1 mg/mL | 10 mcg |
| 2 mg | 3 mL | 0.667 mg/mL | 6.667 mcg |
| 5 mg | 1 mL | 5 mg/mL | 50 mcg |
| 5 mg | 2 mL | 2.5 mg/mL | 25 mcg |
| 5 mg | 3 mL | 1.667 mg/mL | 16.667 mcg |
| 10 mg | 1 mL | 10 mg/mL | 100 mcg |
| 10 mg | 2 mL | 5 mg/mL | 50 mcg |
| 10 mg | 3 mL | 3.333 mg/mL | 33.333 mcg |
Storage
- Lyophilised (unmixed)
- Refrigerated, protected from light.
- Reconstituted
- Refrigerate at 2–8°C. Commonly cited as usable for ~30 days.
What people log it against
Outcomes users commonly track alongside this compound. Listing them is not a claim that it produces them.
- Soft-tissue recovery
- Mobility tracking
Read alongside TB-500
Compounds this one is commonly compared with or mistaken for. Listing a pairing is not a suggestion to use them together.
- BPC-157Research use onlyOften mentioned together and easy to mix up on units: TB-500 amounts are usually written in milligrams, BPC-157 in micrograms.
- Thymosin Alpha-1Not FDA-approvedBoth carry the thymosin name and are unrelated compounds — TB-500 is a thymosin beta-4 fragment, thymosin alpha-1 is a separate immune peptide with its own approvals.
References
Each source below establishes only the specific claim noted with it, last checked 2026-08-13. Storage times reflect common handling guidance and are not established by these references.
- Ruff et al., Phase I safety trial of thymosin beta-4 (2010)
IV thymosin beta-4 tolerated in 40 healthy volunteers up to 1260 mg. Used FULL-LENGTH recombinant Tβ4 (43 aa), not the TB-500 fragment, and reports no elimination half-life for the fragment — which is why halfLifeHours is null.
Run your own numbers
Enter the dose and concentration from your clinician, pharmacy, product instructions, or research protocol. VialPal handles the math.
As printed on the vial label
How much water you add to the vial
From your clinician, pharmacy, product instructions, or research protocol. 1000 mcg = 1 mg
Fills in a vial size this compound is commonly sold in. It does not fill in a dose — check the size against your own vial label.
Enter your numbers
Still needed: vial strength, bacteriostatic water, dose. Use the figures on your vial label and the dose from your clinician, pharmacy, product instructions, or research protocol — VialPal handles the math.
Keep this vial. VialPal holds the concentration, counts down the doses left in it, and logs the ones you actually took.
Get VialPalVialPal does the arithmetic — it does not tell you what to take. Dose decisions belong between you and a qualified clinician.