How to Reconstitute BPC-157: Step-by-Step Guide (2026)
8 mins read
Learn how to reconstitute BPC-157 with bacteriostatic water. Covers supplies, concentration math, step-by-step mixing, storage, and common mistakes.
Peptide Mind - Peptide Research & Education Blog
Research updates, peptide guides, and science-backed insights to help you understand how peptides work and what the evidence says.
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Peptide Mind Research Team
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Why Is My Peptide Cloudy or Gelled? How to Fix It
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How Long Is BAC Water Good For? Shelf Life for Opened, Sealed, Refrigerated and Mixed Vials
8 mins read
BAC water is good for 28 days after opening and 2 to 3 years sealed. Learn how to store bacteriostatic water, when it goes bad, and how to keep it safe.
How Long Is BAC Water Good For? Shelf Life for Opened, Sealed, Refrigerated and Mixed Vials
Frequently asked questions
What is a peptide dosage calculator?
A peptide dosage calculator is a free tool that converts your vial size, bacteriostatic water volume, and target dose into an exact syringe draw volume. Instead of doing the reconstitution math by hand, you enter three inputs and instantly get the concentration of your solution and how many milliliters or syringe units to draw. This calculator works for single peptide compounds and multi-peptide blends.
How do I calculate peptide dosage from a vial?
To calculate your peptide dose, divide the total peptide content of your vial in micrograms by the volume of bacteriostatic water you added in milliliters. This gives you your solution concentration in mcg/mL. Then divide your target dose by that concentration to get your draw volume. For example, a 5mg (5,000 mcg) vial reconstituted with 2mL of BAC water gives a concentration of 2,500 mcg/mL. A 250 mcg dose would require drawing 0.1mL. This calculator automates all of those steps instantly.
How much Bacteriostatic water should I add to a peptide vial?
Most people add 2mL to 3mL of bacteriostatic water per vial, but the right amount depends on the dose you want to draw and the syringe size you are using. Adding 1mL to a 5mg vial gives you a concentration of 5,000 mcg/mL, making each dose very small in volume. Adding 2mL gives you 2,500 mcg/mL, which is easier to measure on a standard insulin syringe. A general guideline is to choose a volume that puts your typical dose somewhere between 10 and 30 units on a U-100 syringe. Use the calculator above to test different water volumes and find what works for your dose.
How are peptides different from proteins?
Both are made of amino acids, but peptides are much smaller than proteins. Because of their tiny size, peptides can act like tiny messengers in the body, sending specific signals to your cells to tell them exactly what to do.