The math for this vial
- Concentration: 5 mg ÷ 2 mL = 2.5 mg/mL (2,500 mcg/mL).
- Volume of one U-100 unit: 1 ÷ 100 = 0.01 mL.
- Mass in one unit: 2,500 mcg/mL × 0.01 mL = 25 mcg.
- The whole vial is 200 U-100 units of solution, more than one 1 mL syringe holds.
On a U-40 syringe each unit is 0.025 mL, so each unit holds 2.5 times as much: 62.5 mcg at 2 mL. See U-100 vs U-40 units.
Unit chart
What common U-100 readings hold from a 5 mg vial, by water volume.
| Units | mL | 1 mL water | 2 mL water | 3 mL water |
|---|---|---|---|---|
| 1 | 0.01 | 50 mcg | 25 mcg | 16.7 mcg |
| 5 | 0.05 | 250 mcg | 125 mcg | 83.3 mcg |
| 10 | 0.1 | 500 mcg | 250 mcg | 166.7 mcg |
| 20 | 0.2 | 1 mg | 500 mcg | 333.3 mcg |
| 25 | 0.25 | 1.25 mg | 625 mcg | 416.7 mcg |
| 50 | 0.5 | 2.5 mg | 1.25 mg | 833.3 mcg |
| 100 | 1 | 5 mg | 2.5 mg | 1.667 mg |
About this vial size
5 mg is the smallest common BPC-157 vial. Across the water volumes above, one U-100 unit holds between 16.7 mcg (at 3 mL) and 50 mcg (at 1 mL). A 10 mg vial at the same water volume is 2 times as concentrated as this one.
Microgram-scale amounts from a 5 mg or 10 mg vial often land between 5 and 25 units. Readings that small are where syringe choice matters: a 0.3 mL U-100 syringe is marked every unit (some every half unit), while a 1 mL syringe is marked every 2 units.
Storage and handling
- There is no approved label and no validated stability data for reconstituted BPC-157. Rodent studies used freshly prepared solutions.
- General practice for lyophilized peptides applies: sealed vials cold and dark; once reconstituted, refrigerate (2-8 °C), avoid freezing and repeated warming, and label with date and concentration.
BPC-157 is not an approved drug anywhere. FDA lists it in Category 2 (significant safety risks) for compounding; a 2026 advisory vote and an interim policy could change that for pharmacies, not for research sellers.