How to Reconstitute Peptides

Lyophilized peptides arrive as a freeze-dried powder puck. Reconstituting them is easy — but doing it wrong can degrade an entire vial. Here’s the right way, start to finish.

What you need

• Your peptide vial (lyophilized powder)
• Bacteriostatic water — included free with every pack we sell
• A sterile syringe with needle
• Alcohol swabs

Step by step

1. Let vials reach room temperature. Cold glass plus warm air means condensation.
2. Swab both vial tops with an alcohol wipe.
3. Draw your bacteriostatic water. The volume is your choice — it sets the final concentration. A common starting point is 1–2mL per vial.
4. Inject slowly against the glass wall of the peptide vial — never straight into the powder. A direct jet can shear delicate peptide chains.
5. Swirl gently. Never shake. Most peptides dissolve clear within a couple of minutes; some take longer. If it stays cloudy after fully dissolving, don’t use it.
6. Refrigerate. Reconstituted vials live at 2–8°C and stay usable for weeks thanks to the bacteriostatic preservative.

The concentration math

Concentration = milligrams of peptide ÷ millilitres of water. A 10mg vial reconstituted with 2mL gives 5mg/mL — so every 0.1mL drawn contains 0.5mg. Write your dilution on the vial label the moment you make it; future-you will be grateful.

Storage rules

• Sealed lyophilized vials: refrigerate at 2–8°C; very stable.
• Reconstituted vials: refrigerate, use within a few weeks.
• Never freeze a reconstituted peptide, and keep vials out of direct light.

One more reason packs beat singles: all ten vials in a 10 Pack are from one batch, so your dilution math and results stay consistent from first vial to last. Browse the range or start with the Canada buyer’s guide.