TB-500 Dosage Calculator
TB-500 (a synthetic fragment related to Thymosin Beta-4) is usually supplied in 2 mg, 5 mg, or 10 mg vials. Enter your vial strength and diluent volume to see the concentration and the exact U-100 syringe mark for your target amount.
- Concentration
- 2500 mcg / mL
- Concentration
- 2.50 mg / mL
- Per syringe unit
- 25.0 mcg / unit
- Draws per vial
- 5.0
- Total solution
- 200 units
Every figure below is arithmetic performed in your browser. Nothing here is a protocol, recommendation, or medical guidance — all Ares Research materials are supplied for in-vitro laboratory research only.
HPLC purity and mass-spec identity confirmation, published per batch. US-based tracked shipping.
TB-500 target amounts are usually in milligrams
Unlike microgram-scale compounds, TB-500 research amounts are typically expressed in whole or half milligrams. A 5 mg vial in 2 mL gives 2,500 mcg/mL, so a 1 mg draw is 0.4 mL — 40 units on a U-100 barrel — and the vial holds 5 such draws. Switch the dose unit above to mg to work directly in the scale you are used to.
Pairing TB-500 with BPC-157 in the same workflow
TB-500 and BPC-157 are frequently studied alongside each other, but they are separate compounds supplied in separate vials and should be reconstituted and measured independently. Run each through the calculator with its own vial strength and diluent volume rather than assuming the same unit reading applies to both — the concentrations are usually different.
Handling notes
Add bacteriostatic water down the side of the vial and swirl gently until the cake dissolves; do not shake. Keep the reconstituted vial refrigerated and out of direct light. Because TB-500 draws are larger in volume than typical microgram-scale compounds, a lower concentration is rarely necessary — 2 mL to 3 mL on a 5 mg vial usually keeps draws under half a barrel.
Frequently asked questions
How many units is 1 mg of TB-500?
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With a 5 mg vial reconstituted in 2 mL, the concentration is 2,500 mcg/mL, so 1 mg (1,000 mcg) is 0.4 mL — 40 units on a U-100 insulin syringe. In 5 mL of diluent the same 1 mg becomes 100 units, a full barrel.
How much bacteriostatic water should I add to a TB-500 vial?
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2 mL to 3 mL is a common choice for a 5 mg vial because it keeps a 1 mg draw between roughly 40 and 60 units. Larger diluent volumes push milligram-scale draws toward or past a full barrel, which means splitting a single draw across two fills.
Is TB-500 the same as Thymosin Beta-4?
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No. TB-500 is a synthetic peptide fragment related to the naturally occurring protein Thymosin Beta-4, not the full protein itself. They are frequently discussed together in the literature but are distinct materials with different molecular weights, so documentation and certificates of analysis should specify which one a vial contains.
How should reconstituted material be stored?
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Once reconstituted, most research peptides are held refrigerated at roughly 2–8°C, protected from light, in the original sealed vial. Bacteriostatic water contains 0.9% benzyl alcohol, which suppresses microbial growth in the diluent. Temperature, light exposure, and repeated freeze-thaw cycles all affect stability, so consult the compound-specific certificate of analysis and published stability data.
How do I read a U-100 insulin syringe?
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A U-100 barrel is graduated in units where 100 units equal 1 mL, so each single-unit mark is 0.01 mL. To convert a volume in mL to units, multiply by 100 — 0.25 mL is 25 units. This calculator reports both figures so you can cross-check the mark against the volume.
Related calculators
5 mg and 10 mg BPC-157 vials → concentration, syringe units, and draws per vial.
Any vial, any diluent volume, any target amount → concentration, syringe units, doses per vial.
Vial mass + diluent volume → mg/mL, mcg/mL, and mcg per syringe unit.