Clear, practical guidance on storing, reconstituting, and keeping your peptides stable. Use the dosing calculator to work out your measurements, and browse the catalog for handling notes on each peptide.
Temperature is the single biggest factor in peptide stability. Cold is your default.
Sterile technique every time. One careless touch can ruin a whole vial.
Light and moisture quietly degrade peptides. Shield them from both.
Storage depends on whether the peptide is still a sealed powder or already mixed.
Mixing (reconstituting) a peptide is just adding sterile liquid to the powder — slowly and cleanly.
Peptide vial, bacteriostatic water, alcohol swabs, and a sterile syringe. Work on a clean surface and wash your hands.
Use the calculator below to decide how much water to add for the dose you want.
Wipe the rubber stopper of each vial with a fresh alcohol swab and let it dry.
Aim the needle at the inside wall of the vial so the liquid runs down gently onto the powder — don't blast it directly onto the peptide.
Gently swirl or roll the vial until fully dissolved. Shaking can damage the peptide and create foam.
The solution should be clear. Discard if it's cloudy, discolored, or has particles floating in it.
A few small habits keep a vial good for its full shelf life.
Back of the fridge, not the door. Use a small cooler with ice packs when traveling.
Write the reconstitution date on the vial so you always know how old the solution is.
Wipe the stopper before each draw to keep the contents sterile.
Keep vials in their box or an opaque container, even inside the fridge.
Once mixed, keep it refrigerated and stable — repeated freezing destroys potency.
Clear and colorless = good. Cloudy or particles = discard.
Enter your numbers to find out how much liquid to add and how far to draw the syringe for each dose.
Subtle Science provides general educational information about safe handling and storage practices only. It is not medical advice and is not a substitute for guidance from a qualified healthcare professional or the specific instructions provided with your product. Always follow your supplier's storage directions and applicable laws and regulations in your area. Verify every calculation before relying on it.