Field Guides / Guide 05

Reconstitution, Step by Step

How to turn a vial of powder into a correctly-dosed solution without contaminating it, wasting it, or guessing at the math.

Peptides ship as lyophilized (freeze-dried) powder because the molecules are fragile in solution. Reconstitution is just adding the right water back — done carefully, it's a two-minute job. Here's the whole process.

What you need

• The peptide vial (powder)
• Bacteriostatic water (sterile water with 0.9% benzyl alcohol — the preservative is what lets a mixed vial last weeks; plain sterile water lasts ~days)
• A syringe for transferring water (3–5 ml)
• U-100 insulin syringes for dosing
• Alcohol wipes

The steps

1. Do the math first. Use the calculator: vial mg + water ml → concentration and your exact draw per dose. Choose the water amount so your dose lands in a measurable range (roughly 5–30 units on an insulin syringe).
2. Wipe both vial tops with an alcohol wipe. Let them dry.
3. Draw the bacteriostatic water into the transfer syringe.
4. Inject the water slowly, down the inside wall of the vial — never jet it directly onto the powder. Peptides are fragile; turbulence shears them.
5. Do not shake. Ever. Swirl gently or just let it sit — most peptides dissolve on their own in minutes.
6. Label the vial — compound, concentration (e.g. "5,000 mcg/ml"), date mixed. Future-you with three vials in the fridge will thank present-you.
7. Refrigerate (2–8 °C). Most mixed peptides hold ~4 weeks; details and exceptions on each compound's profile.

The three mistakes that ruin vials

• Shaking — degrades the peptide. Swirl.
• Room-temperature storage after mixing — the clock runs much faster warm.
• Guessing the math — a misplaced decimal is a 10× dosing error. The calculator exists so arithmetic is never the failure point.

Special cases

• Blend vials are one mix, one draw. The Glow, Klow, and BPC/TB blends arrive as a single combined powder — reconstitute the vial once and every draw carries all the components in ratio. You never mix blends yourself.
• Different diluents: a few compounds want something other than bacteriostatic water (e.g. IGF-1 LR3 often calls for acetic-acid diluent) — the profile page and your supplier's data sheet win over the general rule. When the two disagree, ask the supplier and believe the COA paperwork.
• Added the wrong amount of water? Nothing is ruined — the peptide is all still in the vial. Recompute in the calculator with the water you ACTUALLY added and your draw number simply changes. Never dump a vial over a water mistake.
• Won't fully dissolve, foamed up, or looks off? The Troubleshooting guide covers every version of "is this normal?" — most of them are.

Mixing a whole program

Starting a multi-compound program? Mix only what you're starting this week — sealed powder keeps far longer than solution. Your Protocol Card lists the exact water per vial for everything in your program in one table, and the Supply Builder already counted the bacteriostatic water your full run needs.

Research protocols, not a prescription — talk to a physician before touching anything.