Why sticker price lies
A $40 vial isn't automatically cheaper than a $60 vial. What matters is how much actual compound you get — measured in milligrams (mg). Two listings for the same peptide can differ several times over in real value once you account for vial size.
Cost per mg, explained
Cost per mg = price ÷ total milligrams in the vial.
- A 5 mg vial at $40 → $8.00 / mg
- A 10 mg vial at $60 → $6.00 / mg
The "more expensive" $60 vial is actually the better deal. Cost-per-mg normalizes price across different vial sizes so you compare apples to apples.
How to use it
- Find the peptide you want.
- Sort listings by lowest cost / mg.
- Check stock and vendor before deciding.
Every listing on PEPTIDE·INDEX shows cost-per-mg automatically, so you never have to do the math.
What about blends?
For blends, total mg is the sum of all components in the vial — so cost-per-mg still works, it just reflects the combined compound.
Prices are aggregated for research-use comparison only and can change at any time.