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Your first vial, from sealed box to first dose. How to mix it, store it, and measure it — in plain steps, no prior experience needed.
The complete first-timer's walkthrough
What you'll need
Lay these out before you start. Most come together in a basic starter kit.
Your peptide vial
The sealed vial of freeze-dried (lyophilized) powder.
Bacteriostatic water
Sterile water with 0.9% benzyl alcohol. It's what you mix the powder with, and it keeps the solution stable for weeks.
Insulin syringes (U-100)
Small 29–31 gauge syringes. You'll use these to both mix and inject.
Alcohol wipes
To clean each rubber stopper and the injection site.
A sharps container
A puncture-proof container for used needles. A hard plastic bottle works in a pinch.
The three steps
Reconstitute
Turn the powder into a liquid you can draw.
- 1
Let both vials reach room temperature, then wipe the rubber top of each with an alcohol swab.
- 2
Decide how much bacteriostatic water to add — this sets your concentration. The calculator below does the math for you.
- 3
Draw the water into a syringe. Insert the needle into the peptide vial at an angle so the water runs slowly down the glass wall — not straight onto the powder.
- 4
Let it sit, then gently swirl or roll the vial until the powder fully dissolves and the liquid turns clear.
Never shake: Shaking can damage delicate peptides. Slow and gentle keeps them intact.
Store
Keep it stable until your last dose.
- 1
Once mixed, keep the vial in the refrigerator (about 2–8 °C / 36–46 °F). Don't freeze it.
- 2
Before it's mixed, the sealed powder is fine in a cool, dark drawer — but the fridge is never wrong.
- 3
Keep it out of direct light and away from the freezer wall, where it can accidentally freeze.
- 4
Most reconstituted peptides stay good for several weeks refrigerated. Check your peptide's page for its exact window.
Date the vial: Write the date you mixed it on the label so you always know how fresh it is.
Dose
Measure the right amount, every time.
- 1
Your dose is a weight (mcg or mg). Your syringe is marked in units (IU). The whole job is converting one to the other.
- 2
Concentration = peptide ÷ water added. Example: 5 mg in 2 mL = 2.5 mg (2,500 mcg) per mL.
- 3
A U-100 insulin syringe holds 100 units per mL. So in that example 100 units = 2,500 mcg, which means 10 units = 250 mcg.
- 4
Wipe the stopper, draw a hair past your line to clear air bubbles, then push back to the exact mark.
Let the tool do the math: Enter your vial size and water amount in the calculator — it tells you exactly how many units to draw for any dose.
About specific doses
Starting doses vary a lot from one peptide to the next, and from person to person. We don't print one-size-fits-all numbers here — the steps above teach the mechanics, and these take you the rest of the way:
First-dose checklist
0 of 6 doneTick each step as you go. Your progress is saved on this device.
A few safety basics
- One vial, one person. Never share needles or vials.
- Use each needle once, then drop it straight into the sharps container.
- If the liquid is cloudy, discolored, or has floating bits after mixing, don't use it.
- Start at the low end and give your body time to respond before adjusting anything.
- Peptides are research compounds in most places. Know the rules where you live.
Not sure about your specific peptide?
The AI Advisor gives practical, peptide-specific guidance — reconstitution ratios, storage windows, and sensible starting points — without the runaround.
Ask the AI Advisor