To work out the syringe units for TB-500, you need two numbers: how many milligrams (mg) are in your vial and how many milliliters (mL) of bacteriostatic water you added. Together those set the concentration, and from there the math gives your units. TB-500 is a synthetic peptide related to thymosin beta-4 that is not FDA-approved for human use and is sold for research purposes only. This page is a mixing-math (concentration) tool for educational use — it is not medical advice and does not recommend any dose. Confirm everything with your physician or pharmacist.
TB-500 is a synthetic peptide related to thymosin beta-4, a protein that occurs naturally in the body. It is studied in research settings and is sometimes discussed in peptide communities. Importantly, TB-500 is not FDA-approved for human use and is offered for research purposes only. Nothing on this page is an endorsement, a recommendation to use it, or guidance on whether it is right for you — those are conversations to have with a licensed physician or pharmacist.
TB-500 is typically reconstituted (mixed) with bacteriostatic water — sterile water that contains a small amount of preservative. You add the water to the dry powder in the vial and let it dissolve gently.
One thing worth understanding: your choice of diluent does not change the concentration math. Whether the liquid is bacteriostatic water or another sterile diluent, the concentration is still simply the milligrams of peptide divided by the milliliters of liquid you added. The diluent affects things like shelf life and comfort, not the arithmetic below. Always confirm the appropriate diluent and handling with your pharmacist.
The reconstitution math has two steps. First find the concentration, then convert your desired amount into units on a standard U-100 insulin syringe (where 100 units = 1 mL). Remember that 1 mg = 1000 mcg.
Example 1 — neutral example only; your vial may differ, confirm with your pharmacist. Suppose a 5 mg vial with 2 mL of bacteriostatic water added. Concentration = 5 × 1000 ÷ 2 = 2500 mcg/mL. If someone were measuring out an example amount of 500 mcg purely to show the arithmetic: 500 ÷ 2500 × 100 = 20 units. This number is an illustration of the calculation, not a suggested dose.
Example 2 — neutral example only; your vial may differ, confirm with your pharmacist. Suppose a 10 mg vial with 5 mL of bacteriostatic water added. Concentration = 10 × 1000 ÷ 5 = 2000 mcg/mL. To illustrate the math for an example amount of 1000 mcg (which is 1 mg): 1000 ÷ 2000 × 100 = 50 units. Again, this is only the arithmetic — it is not a recommendation.
If you have heard of "commonly-reported" amounts for TB-500, treat those strictly as background information, not as a recommendation. The right amount, if any, is a decision for you and your physician.
TB-500 vials are commonly sold in 2 mg, 5 mg, or 10 mg sizes. The vial size you have, combined with the exact amount of water you add, is what determines your concentration — so always read your own vial label rather than assuming. Two vials of the same mg can give very different units if different amounts of water were added.
This tool only does arithmetic. It cannot tell you whether a compound is appropriate, safe, or legal for you, and it never suggests a dose. A few honest reminders:
When in doubt, stop and ask a licensed physician or pharmacist. Pepathary is a free, offline organizational and educational tool — it does not provide medical advice.
There is no single answer, because units depend entirely on your concentration. Find your concentration (vial mg × 1000 ÷ water mL), then divide your amount in mcg by that concentration and multiply by 100. For example, at 2500 mcg/mL a 500 mcg measurement works out to 20 units — but that is just the arithmetic for one setup, not a recommendation. Your vial may differ, so confirm with your pharmacist.
That is a choice that changes your concentration, not a fixed rule, and it is best discussed with your pharmacist. Adding more water makes a more dilute solution (more units per amount); adding less makes it more concentrated (fewer units). Whatever you add, the math is the same: concentration = vial mg × 1000 ÷ water mL. This page does not recommend a specific water amount.
No. TB-500 is not FDA-approved for human use and is sold for research purposes only. It is a synthetic peptide related to thymosin beta-4. Whether to use any research compound is a decision for a licensed physician — this page is educational only and does not recommend it.
No. The concentration math depends only on the milligrams in the vial and the milliliters of liquid added — not on which sterile diluent you use. TB-500 typically uses bacteriostatic water. The diluent can affect shelf life and comfort, but not the arithmetic. Confirm the appropriate diluent with your pharmacist.
No. This is a mixing-math (concentration) tool that converts a vial size and water amount into syringe units. It does not select, suggest, or endorse any dose. Any number shown is a neutral example of the arithmetic. Always confirm dosing decisions with your physician or pharmacist.