What Is Peptide Reconstitution?
Reconstitution is the step that turns a vial of freeze-dried peptide powder into a measurable liquid. Nothing about the peptide amount changes — you're just dissolving it so you can draw an exact dose.
Why peptides come as powder
Most research peptides are shipped lyophilized — freeze-dried into a small puck or film at the bottom of the vial. Dry powder is far more stable than a solution, so it survives shipping and storage better. The trade-off is that you have to add the liquid yourself before anything can be measured.
What reconstitution actually does
You inject a sterile diluent — usually bacteriostatic water — into the vial, and the powder dissolves into a clear solution. The amount of peptide hasn't changed; it's now spread through the liquid you added.
The concentration that results
That single number drives every dose. A 10 mg vial in 2 mL of water is 5 mg/mL (5,000 mcg/mL). Put the same vial in 1 mL and it's twice as strong; put it in 4 mL and it's half as strong.
Choosing the water volume
Because volume sets concentration, it also sets how big each draw is. More water → larger, easier-to-read draws for small doses; less water → smaller draws and fewer units. The calculator shows the concentration, the draw in insulin units, and how many doses a vial yields for any volume — so you can pick a volume that measures comfortably.
Open the reconstitution calculator