Cost per Dose Explained
Cost per dose is the vial price divided by the number of doses it yields, and the number of doses is the vial strength divided by your per-injection dose. A 10 mg vial dosed at 2 mg yields five doses, so a cost per dose is the vial price divided by five. Multiply by weekly frequency to project weekly and monthly spend.
For educational and research purposes only. Not medical advice. Always consult a licensed healthcare professional before starting any protocol.
The core formula
Two numbers drive the true cost of a protocol: the vial price and how many doses that vial yields. The number of doses is simply the total vial strength divided by your per-injection dose. A 10 mg vial dosed at 2 mg per injection yields five doses. Cost per dose is then the vial price divided by that number of doses.
Because it is based on the vial strength, reconstitution volume does not affect cost per dose at all. Adding more or less bacteriostatic water changes the units you draw, not how many milligrams the vial contains, so it never changes the price of a dose.
Weekly and monthly projections
To turn cost per dose into ongoing spend, multiply by how many times you inject per week. For a weekly-dosed GLP-1 that is one injection; for a peptide dosed several times a week it is higher. To estimate monthly cost, scale the weekly figure by an average month of about 4.33 weeks, which is 52 weeks divided by 12 months.
What changes the number
Dose size is the biggest lever: a larger dose empties the vial faster, raising cost per dose. Titrating upward therefore increases spend over time, which is worth planning for. Buying larger vials often lowers the price per milligram, but only helps if you can use the vial before it expires. The cost-per-dose calculator lets you test these trade-offs directly.
Frequently asked questions
How is cost per dose calculated?
Divide the vial price by the number of doses it yields. The number of doses is the vial strength divided by your per-injection dose, so a 10 mg vial dosed at 2 mg gives five doses.
Does reconstitution volume change my cost per dose?
No. Cost per dose depends on vial strength and dose size, not on how much water you add. Water changes the units you draw, not the milligrams in the vial.
How do I estimate monthly cost?
Multiply cost per dose by injections per week, then multiply by 4.33 to scale one week to an average month (52 weeks divided by 12).
Why does my cost rise as I titrate?
Larger doses use up the vial faster, so each dose costs more and you buy vials more often. Factor titration into any budget projection.