You can research the perfect peptide stack, source high-quality compounds, and follow an expert protocol — but if you reconstitute your peptides incorrectly, none of it matters. This guide covers everything you need to know about peptide reconstitution from the ground up.
What You Need Before You Start
Essential Supplies
- Bacteriostatic water (BAC water): Sterile water with 0.9% benzyl alcohol as a preservative. Never use regular sterile water for multi-use vials.
- Insulin syringes (U-100, 1 mL): 29–31 gauge needles for subcutaneous injection.
- Alcohol swabs: For sterilizing vial tops and injection sites.
- A clean workspace: Wipe down with isopropyl alcohol before starting.
Step-by-Step Reconstitution Process
Step 1: Decide How Much BAC Water to Add
| Peptide in Vial | BAC Water Added | Concentration | Per 10 units on syringe |
|---|---|---|---|
| 5 mg (5000 mcg) | 2 mL | 2500 mcg/mL | 250 mcg |
| 5 mg (5000 mcg) | 2.5 mL | 2000 mcg/mL | 200 mcg |
| 5 mg (5000 mcg) | 1 mL | 5000 mcg/mL | 500 mcg |
| 2 mg (2000 mcg) | 2 mL | 1000 mcg/mL | 100 mcg |
| 10 mg (10000 mcg) | 2 mL | 5000 mcg/mL | 500 mcg |
The "easy math" rule: Adding 2 mL of BAC water to a 5 mg vial gives 250 mcg per 10 units — clean, round numbers that reduce dosing errors.
Step 2: Add BAC Water to the Peptide Vial
- Swab the vial top with alcohol
- Aim the needle at the inside wall of the vial — NOT directly at the powder
- Depress the plunger SLOWLY. Let water trickle down the side. Never squirt directly onto the powder.
- Never shake the vial. Gently swirl only.
Step 3: Let It Dissolve
Set the vial on a flat surface for 5–15 minutes. The solution should be clear and colorless. If cloudy or discolored, do not use.
The Dosing Math
Units to draw = Desired dose (mcg) ÷ mcg per unit
Worked Examples
5 mg BPC-157 + 2 mL BAC water, want 250 mcg:
Concentration: 5000/2 = 2500 mcg/mL ? 25 mcg/unit ? 250/25 = 10 units
2 mg Ipamorelin + 2 mL BAC water, want 200 mcg:
Concentration: 2000/2 = 1000 mcg/mL ? 10 mcg/unit ? 200/10 = 20 units
5 mg CJC-1295 + 2.5 mL BAC water, want 100 mcg:
Concentration: 5000/2.5 = 2000 mcg/mL ? 20 mcg/unit ? 100/20 = 5 units
Storage Guidelines
| Peptide State | Storage Method | Shelf Life |
|---|---|---|
| Lyophilized (unreconstituted) | Freezer (-20°C) | 12–24+ months |
| Lyophilized (unreconstituted) | Refrigerator (2–8°C) | 6–12 months |
| Reconstituted with BAC water | Refrigerator (2–8°C) | 21–28 days |
| Reconstituted with sterile water (no preservative) | Refrigerator | 48–72 hours max |
Critical Rules
- Never freeze reconstituted peptides. Ice crystals damage peptide structure.
- Protect from light. UV accelerates degradation.
- Never heat peptides.
Common Mistakes That Ruin Peptides
- Shooting water directly onto the powder: The mechanical force can denature the peptide. Always aim at the vial wall.
- Shaking the vial: Creates foam and mechanical stress that denatures proteins.
- Using sterile water for multi-dose vials: Without benzyl alcohol, bacteria grow after the first puncture.
- Leaving vials at room temperature: Some peptides lose significant potency within 24 hours at room temp.
- Reusing needles: Introduces contamination and needles dull after one use.
- Math errors: The difference between 0.1 mL and 1 mL is a 10x error. Always double-check.
Subcutaneous Injection Technique
- Swab vial top, draw calculated dose, tap out air bubbles
- Common sites: abdomen (1–2 inches from navel), thigh, upper arm
- Swab injection site, pinch skin fold, insert at 45–90 degrees
- Depress plunger slowly, wait 5–10 seconds before withdrawing
- Rotate injection sites to prevent lipodystrophy
Signs Your Peptide Has Gone Bad
- Cloudiness — suggests contamination or denaturation
- Particles or floaters — do not use
- Color change — any yellowing is a red flag
- Diminished effects — likely degradation if vial is more than 3–4 weeks old
- Unusual smell — indicates bacterial contamination
Can I use saline instead of bacteriostatic water?
Bacteriostatic saline (with 0.9% benzyl alcohol) can be used. Plain sterile saline without preservative should not be used for multi-dose vials.
Can I travel with reconstituted peptides?
Yes, but keep them cold with an insulated travel case and ice packs. For longer trips, bring lyophilized vials and BAC water and reconstitute at your destination.
I accidentally shook my vial vigorously. Is it ruined?
Not necessarily. A single vigorous shake may denature a percentage of molecules, reducing potency. If the solution is clear, continue using it but monitor effects. If it became foamy or cloudy, discard and start fresh.
This information is for research and educational purposes only. Consult a healthcare professional before using any compounds.