BPC-157 20 mg Vial: Reconstitution and Dosing Chart

How much bacteriostatic water to add to a 20 mg vial of BPC-157, the concentration you get, and a full dose-to-units chart.

Medically reviewed by Juan Pablo Frías, MD · 3 Oct 2026 · DisclosureGastric pentadecapeptideUpdated 3 Oct 2026

Vial size: 20 mg
With 2 mL water: 10 mg/mL; common choice
10 units contain: 1000 mcg; at 2 mL, U-100
Whole vial: 200 units; 2 mL on a U-100 scale

How much water to add

Bacteriostatic water only changes the concentration, not the amount of BPC-157 in the vial. More water means more units per dose (easier to read), less water means fewer.

BPC-157 20 mg vial: concentration by water added
Water added	Concentration	10 units contain	100 mcg is	Whole vial
1 mL	20 mg/mL	2000 mcg	0.5 u	100 u
2 mL	10 mg/mL	1000 mcg	1 u	200 u
2.5 mL	8 mg/mL	800 mcg	1.3 u	250 u
3 mL	6.667 mg/mL	666.7 mcg	1.5 u	300 u

Calculator and full dosing table

Preset to the 20 mg vial. Change any value; the table below the result updates with it.

1Vial size

2Bacteriostatic water added

3Dose per injection

4Syringe (U-100)

Draw to

3units

= 0.03 mL on a 1 mL U-100 insulin syringe

20 mg vial2 mL water300 mcg dose

Concentration: 10 mg/mL
Doses per vial: 66
Weeks (1 dose/wk): 66

Math only. It does not recommend a dose.

Dosing table for a 20 mg vial

Syringe units (U-100) for each dose, by how much bacteriostatic water you add.

BPC-157: U-100 syringe units per dose for a 20 mg vial
Dose	1 mL water	2 mL water	2.5 mL water	3 mL water
100 mcg	0.5	1	1.25	1.5
200 mcg	1	2	2.5	3
250 mcg	1.25	2.5	3.13	3.75
300 mcg	1.5	3	3.75	4.5
400 mcg	2	4	5	6
500 mcg	2.5	5	6.25	7.5
750 mcg	3.75	7.5	9.38	11.25
1000 mcg	5	10	12.5	15

How the math works

Concentration is the vial's milligrams divided by the water you add. Volume to draw is your dose divided by that concentration. On a U-100 syringe, 1 mL is 100 units, so units = mL × 100.

20 mg ÷ 2 mL = 10 mg/mL
300 mcg = 0.3 mg; 0.3 mg ÷ 10 mg/mL = 0.03 mL
0.03 mL × 100 = 3 units

3 units · 0.03 mL · 300 mcg from 20 mg + 2 mL

Math only. The amounts in these tables are reference values for the arithmetic, not dose recommendations.

Common questions

How much water goes in a 20 mg vial of BPC-157?

That choice only changes the concentration. With 2 mL, a 20 mg vial is 10 mg/mL; with 1 mL it is 20 mg/mL. Less water means fewer units per dose and harder-to-read marks for small doses.

How many units is 100 mcg from a 20 mg vial?

With 2 mL of water, 100 mcg is 1 units on a U-100 syringe. With other water amounts, see the table.

How many doses are in a 20 mg vial?

Divide the vial size by the dose (in the same unit). The calculator on this page shows the number of whole doses for any dose you pick.

More on BPC-157

DosageDoses used in published studies, with the source for each.CalculatorVial, water and dose to syringe units.Side effectsWhat labels and studies report, and what is unknown.ResultsStudy outcomes and when they were measured.PricePrice per mg and per week from dated listings. No vendor links.Legal statusFDA, compounding and WADA status with dates.

Sources

1Metric (SI) Prefixes (NIST Reference on Constants, Units, and Uncertainty)National Institute of Standards and Technology (NIST) · 2025physics.nist.govAccessed 2 Oct 2026
2BASAGLAR (insulin glargine) injection, prescribing information (DailyMed)U.S. Food and Drug Administration / DailyMed (Eli Lilly and Company label) · 2026dailymed.nlm.nih.govAccessed 2 Oct 2026

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