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For the TB-500 5 mg vial. Enter the bacteriostatic water you add and the amount you want, and see exactly where to draw on the syringe, in units and mL.
1 mg = 1,000 mcg. Type any amount, or tap a common one.
Almost all insulin-style syringes are U-100. Check the packaging if you're not sure.
Draw to
| In each draw | Amount |
|---|
What each mark on the syringe holds with this mix.
TB-500 is a synthetic fragment based on the active region of Thymosin Beta-4, studied in preclinical research on cell migration and tissue repair. CoreVionRX supplies it as a 5 mg lyophilized vial.
At 5 mg, the vial is half the size of a typical BPC-157 vial, so the same amount of water gives half the strength. With 2 mL of bacteriostatic water it is 2.5 mg/mL and every unit on a U-100 syringe holds 25 mcg. If you work with TB-500 and BPC-157 together, the Wolverine calculator handles the combined vial. For laboratory research use only.
View TB-500 5 mg Read the TB-500 research guide All peptides calculator
Every reconstitution calculator uses the same three steps. Here they are in plain numbers, so you can check any result by hand.
mg in vial ÷ mL of water = mg/mL5 mg + 2 mL of bacteriostatic water = 2.5 mg/mL. The water changes the strength, not the amount of peptide.
amount you want ÷ strength = mLFor 500 mcg (0.5 mg): 0.5 ÷ 2.5 = 0.2 mL.
mL × 100 = units (U-100)0.2 mL × 100 = 20 units. On a U-100 syringe, 1 unit is always 0.01 mL, whatever the barrel size.
Same vial, different amounts of water. More water spreads the same peptide across more liquid, so each mark holds less and draws get bigger.
| Water added | Strength | 10 units holds | 500 mcg = |
|---|---|---|---|
| 1 mL | 5 mg/mL | 500 mcg | 10 units |
| 2 mL | 2.5 mg/mL | 250 mcg | 20 units |
| 3 mL | 1.67 mg/mL | 167 mcg | 30 units |
| 5 mL | 1 mg/mL | 100 mcg | 50 units |
Each one opens with the right vial size and shows the numbers for that peptide.
There is no single correct amount: water changes the strength, not how much peptide is in the vial. For example, with 2 mL the vial is 2.5 mg/mL and every 10 units holds 250 mcg; with 3 mL the vial is 1.67 mg/mL and every 10 units holds 167 mcg. More water makes each draw larger and easier to measure. A common choice for this vial is 2 mL.
With 2 mL of water in the 5 mg vial, 500 mcg is 20 units (0.2 mL) on a U-100 syringe. A different amount of water gives a different answer, so enter your own numbers in the calculator above.
At 500 mcg per draw there are 10 draws (5 mg ÷ 0.5 mg). The water amount does not change this number, only the size of each draw.
Plan on about one week in the fridge (2–8°C) as a conservative standard. For longer, split the solution into single-use portions and freeze them, avoiding repeated freeze-thaw cycles. Keep the unmixed powder cold, dry and dark.
mcg and mg measure how much peptide you have (1 mg = 1,000 mcg). mL measures liquid. Units are just the markings on an insulin-style syringe: on a U-100 syringe, 1 unit = 0.01 mL, so 100 units = 1 mL.
No. 0.3 mL, 0.5 mL and 1 mL insulin syringes are all U-100: 1 unit is always 0.01 mL. Only the barrel size changes. Smaller barrels have finer markings, which makes small draws easier to read.
More detail: Reconstitution guide · Storage guide
Research peptides, blends and the bacteriostatic water to mix them.
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