How we compare peptide prices

What we compare

We compare owner-approved listings from the partner vendors in our index. This is not a survey of every supplier or a certification of vendor quality. Formats and package sizes remain separate offers within each compound comparison.

Regular prices, not temporary sales

The base price is the supplier’s regular catalog price when it can be verified. Estimated after-code prices subtract the applicable partner discount from that base. We do not stack temporary sale prices or promotional banners into these estimates.

How cost per mg is calculated

The estimated after-code package price is divided by verified total active-ingredient mass in milligrams. A clearly labeled concentration and volume or strength and count can establish total mass. If mass is unclear, cost per mg is unavailable. Different forms, ingredients and package sizes may not be directly comparable.

What the median means

The median cost per mg is the middle normalized offer in the indexed comparison, not a market-wide average. The lowest indexed price is limited to the listings we track and is not a guarantee of the cheapest price elsewhere.

Freshness and price history

Each offer shows its capture time and availability. A capture is not a live checkout quote. Refreshes can fail or be delayed; verify price, stock, code eligibility, taxes and shipping on the supplier’s website. Legacy captures may include sale prices; verified regular-price comparisons start at a new baseline.

Partner links and editorial approval

Some outbound vendor links are affiliate links and may earn us a commission. A partner relationship is not proof of safety, purity or effectiveness. New listings require owner approval before appearing in the public index. No vendor rating or laboratory-testing claim is implied by inclusion.

For laboratory research only. Not for human or animal consumption. This site does not provide medical advice or recommend personal use.