Reconstitution chart: 5 mg vial
| BAC water added | Concentration | Draw for 2 mg dose | Draw for 2.5 mg dose |
|---|---|---|---|
| 1 mL | 5,000 mcg/mL | 40 units | 50 units |
| 1.5 mL | 3,333 mcg/mL | 60 units | 75 units |
| 2 mL | 2,500 mcg/mL | 80 units | 100 units |
Draws are U-100 insulin syringe units (100 units = 1 mL). Formula: dose in mcg ÷ (vial mcg ÷ water mL) × 100. The calculator above handles any other combination.
About TB-500
TB-500 is a synthetic fragment of thymosin beta-4, a protein present in nearly all human and animal cells that plays a role in cell migration and tissue repair. It has no regulatory approval anywhere, and it is on the World Anti-Doping Agency prohibited list, so tested athletes should treat it as a guaranteed violation. The research base is largely animal and laboratory work.
Unlike most peptides on this site, TB-500 is discussed in whole milligrams. Community protocols typically describe a loading phase of 2 to 2.5 mg twice weekly for several weeks, then a lower maintenance frequency. At those doses a 5 mg vial holds only two injections, so supply math matters: the doses-per-vial box in the result tells you exactly how many draws a vial gives you at your dose.
Milligram doses also mean bigger draws. From a 5 mg vial with 1 mL of water, a 2.5 mg dose is a 50 unit draw, half of a 1 mL syringe. Add 2 mL and the same dose becomes a full 100 units. If the calculator warns that your dose exceeds the syringe, use less water or a bigger syringe rather than splitting a draw by eye.
Quick facts
- Status: no regulatory approval; on the WADA prohibited list for athletes
- Discussed in communities at 2 to 2.5 mg per injection, loading then maintenance
- Common vial sizes: 5 and 10 mg
- Often discussed alongside BPC-157 (the so-called Wolverine combination)