Reconstitution math, without the anxiety.
Most reconstitution mistakes are not arithmetic errors. They are attention errors. A two-step routine that removes most of the cognitive load — and most of the fear — from the moment you draw.
01 — Why people get this wrong
The reconstitution math is actually trivial. The hard part is that you do it once, you understand it for ninety seconds, and then you forget it until next month — and next month you're tired, or distracted, or it's a different vial size, and you redo the calculation under pressure. That's where the errors enter.
02 — The math, once
For any peptide, the formula is the same:
units per click = (dose in mcg ÷ concentration in mcg/mL) × syringe-units-per-mL
For a U-100 insulin syringe (the only kind anyone should be using for these doses), syringe-units-per-mL is 100. So:
That's it. The math doesn't get harder. Everything else is logistics and attention.
03 — The routine
This is the routine we recommend, in order, every time:
- Pre-flight, on paper. Before touching a needle, write the dose, the vial concentration, and the units on a piece of paper or in REGEN. Don't compute in your head at the moment of drawing.
- Check the vial label. Out loud. The mg quantity, the lot, and the expiry. Errors here are catastrophic and surprisingly common.
- Reconstitute slowly. Aim BAC water at the side of the vial, not directly at the lyophilized cake. Swirl, don't shake. Wait until the solution is fully clear before drawing.
- Draw the exact number, then stop. If you overshoot, push back into the vial and redraw. Don't shave to get exact — the small amount of air you compress in is harmless, the wrong dose is not.
- Log immediately. Not later. Not after the injection. Before. This is the single change that eliminates double-doses.
04 — Edge cases
Multi-peptide blends. Same math, just done per component. Don't try to do it in your head. Use the calculator.
Different syringe sizes. If you're using anything other than a U-100 1mL insulin syringe, stop and use one. The U-100 1mL is the standard for a reason: the math is clean, the calibration is precise, the unit increments are visible.
Refrigeration interruptions. A few hours at room temperature is fine for most reconstituted peptides. A day is not. If you find a vial that's been out longer than overnight, dispose of it. The cost of a vial is much less than the cost of a contaminated dose.
05 — Closing
The right way to think about reconstitution is not as a calculation to perform, but as a routine to execute. A consistent five-step routine, followed every time, eliminates the conditions that produce errors. The arithmetic is easy. The discipline of doing the same five things in the same order is what makes it safe.