Mix your peptides right.
Track every dose.
Never run out.
Tell us the vial and the dose — we do the reconstitution math and show you exactly what to inject. Then we track it: doses left, when the vial expires, and when to reorder. Free. No account.
Three clocks keep every vial on track.
Ramp-up
Some peptides start low and step up over a few weeks before settling at a normal dose. Clock A tracks where you are in that ramp — and switches you to the steady dose on its own.
On & off weeks
Many peptides work best in cycles — a few weeks on, then a break — so your body keeps responding. Clock B tells you whether today is an on day or a rest week.
Vial supply
Once mixed, a vial only lasts so long before it expires or runs out. Clock C counts your doses left and tells you when to reorder — before you hit a gap.
The press release reports one number. The trial tested seven different doses.
Retatrutide's Phase 2 result usually travels as a single −24%. But the trial tested four- and eight-milligram doses on separate ramp-up schedules, then folded them into one average. Here's each dose on its own.
From compound to reorder, in four steps.
Library
Catalog of compounds with dosing, cycling and stability — every row also a calculator preset.
Browse →Calculator
Get the exact water to add and the mark to draw to — then see how long the vial will last before you even mix it.
Solve →Protocol
Save your compound, dose and ramp-up. The three clocks start the moment you mix the vial.
Build →Reorder
When a vial runs low, peptide.fan picks the right size to reorder and drops it in your cart.
See cart →