How to Reconstitute Peptides - Step-by-Step Mixing Guide
8 min read
What is Reconstitution?
Reconstitution is the process of adding a liquid solvent (typically bacteriostatic water) to lyophilized (freeze-dried) peptide powder to create an injectable solution. This is a critical step that directly affects the accuracy of your dosing.
What You'll Need
- Peptide vial - containing lyophilized powder
- Bacteriostatic water (BAC water) - sterile water with 0.9% benzyl alcohol
- Insulin syringes - typically 29-31 gauge, 0.5ml or 1ml
- Alcohol swabs - for sterilizing vial tops
Important: Always use bacteriostatic water, not sterile water. BAC water contains a preservative that prevents bacterial growth and extends the shelf life of your reconstituted peptide.
Step-by-Step Instructions
Step 1: Prepare Your Workspace
Clean your workspace and wash your hands thoroughly. Gather all supplies before beginning. Allow refrigerated peptides and BAC water to reach room temperature (15-30 minutes) before mixing.
Step 2: Clean the Vial Tops
Use an alcohol swab to clean the rubber stopper on both the peptide vial and bacteriostatic water vial. Let them air dry for 30 seconds.
Step 3: Draw Bacteriostatic Water
Using a clean syringe, draw the desired amount of bacteriostatic water. Common amounts: 5mg vial: 1-2ml of BAC water; 10mg vial: 2-3ml of BAC water. More water = lower concentration = easier to measure small doses. Use our calculator to determine the optimal amount for your peptide.
Step 4: Add Water to Peptide
Insert the needle into the peptide vial at a slight angle. Slowly inject the water against the side of the vial, letting it run down gently. Do NOT spray directly onto the powder - this can damage delicate peptide molecules.
Step 5: Let it Dissolve
Do not shake! Shaking can denature (damage) the peptide. Let the vial sit for 5-10 minutes. Gently swirl if needed (rotate the vial slowly). Continue until all powder is completely dissolved.
Step 6: Store Properly
Once reconstituted, immediately refrigerate at 2-8 degrees C (36-46 degrees F). Most peptides remain stable for 3-4 weeks after mixing.
Common Mistakes to Avoid
- Shaking the vial - This can destroy the peptide structure
- Spraying water directly on powder - Use the side of the vial
- Using sterile water instead of BAC water - Shorter shelf life, higher contamination risk
- Reusing syringes - Always use a new sterile syringe
- Not refrigerating promptly - Peptides degrade at room temperature
Now that your peptide is reconstituted, use our free calculator to determine exactly how many units to inject for your desired dose.
Related Resources
- Peptide Calculator - Calculate your exact dose
- Peptide Directory - Browse all peptides
- Peptide Glossary - Look up key terms
- FAQ - Common questions answered
- All Guides - Browse all educational guides