TB-500 calculator
A synthetic fragment related to thymosin beta-4, discussed alongside BPC-157 in repair-focused protocols.
Also known as: Thymosin Beta-4 fragment, TB4
FDA status — not an approved drug Not FDA-approved for any use. Thymosin beta-4 was placed in Category 2 of FDA's bulk drug substances list. Prohibited in sport by WADA.
Calculate your draw
Schedule TB-500 → Set your dosing schedule and get a phone notification when each dose is due. Free.
A worked example
A 5 mg vial reconstituted with 2 mL of bacteriostatic water gives 2.5 mg/mL. A 2500 mcg dose is then 1 mL — about 100 units on a 100-unit insulin syringe, giving roughly 2 doses per vial before accounting for residual volume left in the vial and syringe.
Prefer paper? Download the printable TB-500 dosing chart (PDF) — every vial size and water volume in syringe units, with the same review byline as this page. All charts →
Commonly cited dose range
Figures circulating for TB-500 run from 2000 mcg to 5000 mcg. Community protocols typically describe a loading period followed by less frequent maintenance dosing. No approved human dose exists.
Read this as reference information, not instruction. These numbers describe what is commonly discussed, not what is right for any individual. Dose, frequency, and whether to use TB-500 at all are decisions for a licensed clinician who knows your history.
Common questions
How many units is 2.5 mg of TB-500?
With a 5 mg vial in 2 mL of bacteriostatic water (2.5 mg/mL), 2.5 mg is a full 1 mL — 100 units, the entire barrel of a standard insulin syringe. Using less water, or splitting the dose, keeps the draw more practical.
Can BPC-157 and TB-500 be mixed in one syringe?
Combining compounds changes stability and sterility risk and is not something we provide instructions for. This is a question for a licensed clinician.