Cost per milligram is simply the price of a vial divided by the milligrams of peptide it contains. A $30 vial of BPC-157 at 5 mg costs $6.00/mg. A $50 vial at 15 mg costs only $3.33/mg โ so the "more expensive" $50 vial is actually 44% cheaper per milligram. Sticker price alone would have pointed you at the worse deal.
Two things vary between vendors: the price and the vial size. When both move, your intuition breaks down. A vendor can advertise an eye-catching low headline price on a small vial and still be one of the most expensive sources per milligram. Larger vials almost always win on $/mg, which is why bulk and multi-vial packs usually rank near the top.
Discounts change the ranking again. A vendor at $4.00/mg with a 50% code (like Ascension at 50% off) drops to $2.00/mg and can leapfrog a vendor that looked cheaper at list price. PepsTracker applies every vendor's code before ranking, so what you see is the real out-the-door cost โ not the pre-discount sticker.
| Vendor listing | Price | Size | $/mg (list) |
|---|---|---|---|
| Vendor A โ small vial | $29.00 | 5mg | $5.80/mg |
| Vendor B โ large vial | $65.00 | 10mg | $6.50/mg |
| Vendor C โ value vial | $39.95 | 10mg | $4.00/mg |
By sticker price, Vendor A "wins" at $29. By $/mg, Vendor C wins at $4.00/mg โ and a 15% code would take it to about $3.40/mg. This is the flip that catches most buyers.
Blends (BPC-157 + TB-500, GLOW, KLOW) are compared on total milligrams across all components, so a 20 mg blend at $120 is $6.00/mg. Lipotropic solutions and bacteriostatic water are dosed by volume, so treat their "$/mg" as a rough proxy rather than a like-for-like purity comparison.
Instead of running these calculations by hand for every vendor and vial size, PepsTracker normalizes all 26 vendors to $/mg, applies each discount code, and sorts from cheapest to most expensive in real time. Pick your compound, and the true best value is at the top.
Divide the vial price by the milligrams of peptide in the vial. For discounted pricing, apply the code first, then divide. Example: a $50 vial at 10 mg with 15% off is $42.50 รท 10 = $4.25/mg.
Usually, but not always โ some vendors price larger vials proportionally. The only way to be sure is to compute $/mg for each size, which PepsTracker does automatically.
Frequently. A larger discount can move a mid-priced vendor to the top of the $/mg ranking, which is why PepsTracker applies codes before sorting.