What Is Reconstitution?
Peptides are supplied as lyophilised (freeze-dried) powder and must be reconstituted with Bacteriostatic Water (Bac Water) before use. All Catalyst Peptides vials come paired with a 2mL Bac Water vial to make this process straightforward.
What You'll Need
- Your Catalyst Peptides vial (e.g. Semaglutide 5mg, Tirzepatide 30mg, etc.)
- 2mL Bacteriostatic Water (included with your order)
- 1mL insulin syringe or reconstitution syringe
- Alcohol swabs
- A clean, flat surface
Step-by-Step Reconstitution Guide
- Swab both vial tops with an alcohol swab and allow to air dry for 10–15 seconds.
- Draw up your Bac Water. Using your syringe, draw the desired volume of Bacteriostatic Water. For most vials, 1–2mL is standard.
- Inject slowly into the peptide vial. Insert the needle at an angle and allow the Bac Water to run down the inside wall of the vial — do not inject directly onto the powder.
- Do not shake. Gently swirl or roll the vial between your fingers until the powder is fully dissolved. The solution should be clear.
- Label your vial with the date of reconstitution.
Storage After Reconstitution
- Store reconstituted peptides in the refrigerator at 2–8°C.
- Bacteriostatic Water keeps reconstituted peptides stable for up to 28 days when refrigerated.
- Keep away from light and do not freeze reconstituted solutions.
Calculating Your Concentration
Once reconstituted, you can calculate the concentration of your solution:
Concentration = Peptide amount (mcg) ÷ Volume of Bac Water added (mL)
Example: Semaglutide 5mg (5,000mcg) + 2mL Bac Water = 2,500mcg per mL (or 250mcg per 0.1mL on an insulin syringe).
Peptide-Specific Notes
- Semaglutide (5mg / 15mg): Dissolves readily. Use 1–2mL Bac Water depending on your target dose.
- Tirzepatide (30mg / 60mg / 120mg): May take slightly longer to dissolve — be patient and swirl gently.
- Retatrutide (30mg / 40mg / 60mg): Same process. Ensure full dissolution before drawing doses.
- Melanotan (10mg): Dissolves quickly. Store away from light as Melanotan is light-sensitive.
- GHK-Cu (100mg): Dissolves easily. Can be used topically or as directed by your research protocol.
Disclaimer: All peptides sold by Catalyst Peptides are intended for research purposes only. This content is educational and does not constitute medical advice. Consult a qualified healthcare professional before use.