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What You Need

• Your lyophilized peptide vial
• Bacteriostatic water (BAC water) — NOT sterile water, NOT saline
• Insulin syringes (typically 1mL / 100 unit)
• Alcohol swabs
• A clean workspace

Why Bacteriostatic Water?

BAC water contains 0.9% benzyl alcohol, which inhibits bacterial growth. This means your reconstituted peptide stays viable for weeks in the fridge. Regular sterile water has no preservative — once you open it, bacteria can grow.

Step-by-Step Process

1. Prep Your Workspace

Clean surface, wash hands. Swab the tops of both the peptide vial and BAC water vial with alcohol pads.

2. Draw Your BAC Water

Decide how much water to add. Common amounts:

• 1mL into a 5mg vial = 5mg/mL (each 0.1mL = 500mcg)
• 2mL into a 10mg vial = 5mg/mL (each 0.1mL = 500mcg)

Use our Reconstitution Calculator to figure out exact dosing.

3. Add Water to Peptide Vial

Critical: Aim the stream of water down the SIDE of the vial, not directly onto the powder. Let it run down the glass wall gently. Never shake the vial.

4. Let It Dissolve

Gently swirl if needed. Most peptides dissolve within a few minutes. If it's not dissolving, let it sit in the fridge for 15-30 minutes. Some peptides take longer.

5. Storage

• Refrigerate at 2-8°C (standard fridge)
• Keep away from light
• Use within 4 weeks typically
• Never freeze reconstituted peptides

Reading Your Syringe

A standard 1mL insulin syringe has 100 units:

• 10 units = 0.1mL
• 5 units = 0.05mL

If you reconstituted 10mg in 2mL, then each unit on the syringe = 50mcg. Use our Dosage Calculator to convert.

Pro Tips

• Label your vials with the compound name, concentration, and date reconstituted
• Pre-load syringes for convenience, but use within 24 hours if you do
• If the solution is cloudy or has particles, don't use it
• BAC water vials can be reused — just always swab the top

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