Reconstitution is the process of adding bacteriostatic water (BAC water) to a lyophilized (freeze-dried) peptide powder to create an injectable solution.

The amount of water you add determines the concentration — how much peptide is in each unit of liquid you draw.

The syringe visual shows exactly where to draw the plunger to for your desired dose. The markings correspond to the syringe type you've selected (100u, 50u, or 30u).

• 100 unit syringe = 1 mL total capacity. Each unit mark = 0.01 mL.
• 50 unit syringe = 0.5 mL total capacity. Each unit mark = 0.01 mL.
• 30 unit syringe = 0.3 mL total capacity. Each unit mark = 0.01 mL.

There's no single "correct" amount — it depends on your desired concentration and how much volume you want to inject. Common amounts:

• 1 mL = Higher concentration, smaller injection volume
• 2 mL = Standard, easy math for most peptides
• 3 mL = Lower concentration, easier to measure small doses

More water = easier to measure precise small doses. Less water = less volume to inject per dose.

Enter your vial cost in the optional field, and the calculator will show your cost per dose and estimated monthly cost based on your injection frequency. Great for comparing suppliers or optimizing protocols.

The quick presets auto-fill common vial sizes and starting doses for popular research peptides including BPC-157, Semaglutide, Tirzepatide, TB-500, NAD+, GHK-Cu, and PT-141. You can always adjust values after selecting a preset.

Yes! Click "🔗 Copy Link" to copy a shareable URL that encodes your vial size, water amount, and dose. Anyone who opens the link will see your exact reconstitution setup.