How blends are priced, and why per mg doesn't work for them
A blend holds two or more peptides in one vial. Why PepSpotter compares blends one exact mix at a time, per vial, and never per mg. · 3 Oct 2026
A blend is one vial holding two or more peptides — for example BPC-157 and TB-500 together. Blends are common, and hard to compare: two blends with the same name can hold very different amounts of each ingredient.
Why per mg does not work
For a single compound, the price per mg tells you what each milligram of that compound costs. For a blend, a price per mg folds different compounds into one number.
Take two BPC-157 + TB-500 blends, both 20 mg in total and both $60:
- Vial A: 10 mg BPC-157 + 10 mg TB-500.
- Vial B: 5 mg BPC-157 + 15 mg TB-500.
Per mg, they look identical: $3.00 per mg. They are not the same product, though — the split between the two compounds is different, so one cannot stand in for the other. A price per mg would rank them as equals and hide that.
One exact mix at a time, per vial
PepSpotter compares a blend only with the same blend in the same mix — the same amount of each ingredient — and ranks those listings by price per vial. On a blend's comparison you choose the mix, for example "10 mg + 10 mg", and see every vendor selling exactly that mix, cheapest per vial first. A kit of blend vials is compared per vial too.
The BPC-157 + TB-500 comparison shows how this works, with a Mix selector at the top of the page.
How a mix is written
A mix lists the amount of each ingredient, in the order of the blend's name. "10 mg + 10 mg" on the BPC-157 + TB-500 page means 10 mg of BPC-157 and 10 mg of TB-500 in one vial, 20 mg in total. A three-part blend such as BPC-157 + TB-500 + GHK-Cu is written with three amounts, for example "10 mg + 10 mg + 50 mg". Two listings belong to the same mix only when every amount matches.
The selector also shows how many vendors sell each mix.
Listings that do not state the amounts
Many vendors list a blend by its total only ("20 mg blend"), or by a trade name without the split. Without the amount of each ingredient, nobody can tell which mix it is. PepSpotter shows these listings on the blend's page under "Ingredient amounts not stated", grouped by their total where one is given, and never ranks them against the exact mixes. They stay visible, and nothing is guessed.
"Lowest" needs two vendors
A price is called the lowest only when at least two vendors sell the same exact mix. When only one vendor sells a mix, its price is shown, but there is nothing to compare it with, so it is not labelled the lowest.
Trade names
Some blends are sold under names such as "Wolverine", "GLOW" or "KLOW". The same name can stand for different mixes at different vendors, so a trade-name listing is compared with an exact mix only when it states the amount of each ingredient; otherwise it is shown among the listings whose amounts are not stated, under the vendor's own name.
In short
- Never compare blends per mg.
- Compare one exact mix at a time, per vial.
- Read a listing without stated amounts as an unknown mix, however familiar its name.
For single compounds, how to compare peptide prices per mg still applies. The methodology describes both.