Every peptide and HGH vial ships as a dry powder that you mix with bacteriostatic water before the first injection. This guide walks you through the full process: equipment, sterile technique, mixing, and storage.
Takes about 2 minutes
Addbacteriostatic water
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yourpeptide powder
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aready-to-use vial
Not sure how much water to add or how far to draw the syringe? The dosage calculator picks the right water amount for your dose, shows the exact syringe line to fill to, and tells you how many doses your vial holds. Open the calculator
Peptide vial - the freeze-dried (lyophilized) powder you are mixing
Bacteriostatic water - the standard solvent (get it here)
Insulin syringes (1 ml / 100 units) for both mixing and injecting
Alcohol swabs (70% isopropyl)
A clean, flat surface
Use bacteriostatic water, not sterile water. Bacteriostatic water contains a preservative (0.9% benzyl alcohol) that keeps a multi-dose vial stable for weeks. Do not use sterile water or sodium chloride unless specifically instructed - they have no preservative and must be used immediately. Do not have any yet? We stock WATERMED bacteriostatic water.
Reconstitution steps 7 steps
Prepare your supplies
Gather everything before you start: peptide vial, bacteriostatic water, alcohol swabs, insulin syringe, and a clean surface. Wash your hands thoroughly with soap and water.
If your peptide vial is cold from the fridge, let it sit until it reaches room temperature before mixing. Cold powder dissolves more slowly.
Inspect the vial
Check that the peptide powder is dry, intact, and undisturbed. It should appear as a small white or off-white disc or powder at the bottom of the vial.
Do not use vials where the powder appears melted, clumped, or wet. If the vial contains liquid before you add water, do not proceed - contact info@deuspower.info.
Disinfect the vials
Use an alcohol swab to clean the rubber stopper of both the peptide vial and the bacteriostatic water vial. Apply firm pressure in a circular motion and let the alcohol air dry completely before puncturing.
Draw the bacteriostatic water
Using an insulin syringe, draw the correct amount of bacteriostatic water. The amount depends on your peptide and the dose you want. Pull the plunger slowly to avoid air bubbles.
How much water? Most vials use 1-2 ml. The amount of water does not change how much peptide is in the vial - it only sets the concentration (how much peptide sits in each ml). More water means you draw a bit more liquid per dose, less water means you draw less; the dose itself is unchanged. Let the dosage calculator pick the amount for you - it matches the water to your dose and shows the exact syringe line to fill to.
Inject the water into the peptide vial
Insert the needle through the rubber stopper and angle it so the water runs down the inside wall of the vial. Release the plunger slowly and let the water trickle gently onto the powder. Never spray water directly onto the peptide - this can damage the molecule.
Go slowly. Forceful injection creates bubbles and can denature the peptide. If you see foaming, you are going too fast.
Mix gently
Gently swirl the vial in a slow circular motion. Most peptides dissolve within 1-2 minutes. The solution should turn completely clear with no visible particles. Do not shake the vial - shaking creates foam and can break down the peptide.
If the powder does not fully dissolve after 5 minutes of gentle swirling, place the vial in the fridge for 15-30 minutes and try again. Some peptides take longer to dissolve.
What colour should it be? Clear and colourless is standard. A very faint yellow tint is acceptable for some peptides. Any strong colour - brown, pink, or green - or persistent cloudiness means the peptide has degraded or is contaminated. Do not use it.
Store it properly
Store the reconstituted peptide in the refrigerator at 2-8 degrees C, upright and away from light. Do not freeze it. Most reconstituted peptides stay stable for 28 days when stored correctly.
Label the vial with the date you mixed it, the amount of water you added, and the concentration. This prevents dosing errors and tells you when to discard it.
Storage at a glance
2-8 CRefrigerate, never freeze
28 daysTypical shelf life once mixed
Bac waterPreservative enables multi-dose use
Some peptides differ: HCG keeps up to 60 days, while MOD GRF 1-29 and Follistatin are more fragile and should be used within 14 days. When in doubt, discard a vial that looks cloudy or discolored, has floating bits, or was left out of the fridge.
Is my vial still OK?
A quick check before you inject. Most surprises are harmless - here is what is fine and what means bin it.
Still good - carry on
A faint yellow tint. Normal for some peptides.
A little foam or a few bubbles after adding water. Let it settle, then use.
Powder slow to dissolve. Swirl gently, or fridge it 15-30 minutes; it is fine once it turns clear.
You added slightly too much or too little water. The peptide is unaffected - just recalculate your dose for the amount you added.
Stop - do not use
Cloudy, or particles that will not clear after warming and gentle swirling.
A strong colour - brown, pink, or green.
Tiny rubber bits floating in the liquid (coring).
Liquid already in the vial before you added water. Do not use it - contact info@deuspower.info.
Left out of the fridge for a long time, or past its shelf life.
Common mistakes to avoid
Spraying water onto the powder. Always aim down the side of the vial wall.
Shaking the vial. Swirl gently - shaking denatures the peptide.
Using sterile water instead of bacteriostatic water. Sterile water has no preservative and must be used immediately; bac water allows multi-dose use over weeks.
Storing at room temperature. Reconstituted peptides degrade quickly outside the fridge.
Reusing syringes. Use a fresh syringe for each injection to keep things sterile.
Forgetting to disinfect. Swab the rubber stopper with alcohol before every puncture.
Coring the rubber stopper. Many punctures in the same spot can shed tiny rubber fragments into the solution. Insert at a slight angle and reuse the same entry point - and discard the vial if you see rubber particles floating in it.
Injecting your peptide
Reconstituted peptides go in subcutaneously (SubQ): pinch a fold of belly, flank, or outer-thigh fat, insert at a 45-degree angle, inject slowly, then rotate sites each time. For the full SubQ technique, sites, and rotation, see our injection guide.
Reconstitution FAQ
How much bacteriostatic water should I add?
Most vials use 1-2 ml. The exact amount changes the concentration, which changes how far you draw the syringe for each dose. The easiest way is to let the dosage calculator pick the best water amount for your dose - it shows the exact syringe line to fill to and how many doses your vial holds.
What if I add too much or too little water?
It does not ruin the peptide - the vial still holds the same amount of peptide, only the concentration changes. Work out your dose for the amount of water you actually added, note that amount on the label, and draw to the matching syringe line. If you are unsure, let the dosage calculator recalculate the draw for your real water volume. Do not try to add or remove water from a mixed vial.
What is the difference between bacteriostatic water and sterile water?
Bacteriostatic water contains 0.9% benzyl alcohol, a preservative that prevents bacterial growth, so a multi-dose vial stays usable for weeks in the fridge. Sterile water has no preservative and must be used immediately. For multi-dose peptide vials, always use bacteriostatic water.
Can I freeze a reconstituted peptide?
No. Once mixed, store the vial in the fridge at 2-8 degrees C. Freezing can damage the peptide. The dry powder can sometimes be frozen before mixing, but the reconstituted solution should only be refrigerated.
The powder will not fully dissolve. What do I do?
Keep swirling gently - do not shake. If it has not cleared after about 5 minutes, place the vial in the fridge for 15-30 minutes and swirl again. Some peptides simply take longer to dissolve. If the solution stays cloudy or has visible particles that will not clear, do not use it.
How long does a reconstituted vial last?
Most peptides last 28 days refrigerated. HCG lasts up to 60 days, while MOD GRF 1-29 and Follistatin are more fragile and should be used within 14 days. Always keep the vial cold, upright, and out of direct light.
Can I reuse the same syringe for the next injection?
No. Use a fresh, sterile insulin syringe for every injection. Reusing needles dulls them and risks contaminating the vial. Always swab the rubber stopper with alcohol before each draw.
I see tiny rubber bits in the vial. What happened?
This is called coring - repeated punctures in the same spot push small fragments of the rubber stopper into the solution. To avoid it, insert the needle at a slight angle and reuse the same entry point each time. If you can see rubber particles floating in the liquid, do not use that vial.
This guide is provided to help customers safely reconstitute peptide and growth hormone products. For product-specific reconstitution volumes or usage questions, just reach out using the email above.
