Peptide Price Index

Why we built it

By Jack Ryan

Checking a peptide vendor's certificate of analysis (COA) used to mean hunting through vendor sites and laboratory portals, with no single place to confirm that a report is genuine, current and tied to the product on sale. A screenshot or PDF can be cropped, reused by another seller or altered, and nothing on its face reveals that. A low price can also arrive with fake or missing certificates, customer complaints, poor service, undelivered orders or weak research-use-only compliance, so price alone tells you very little.

That is why the price index shows each price next to its evidence. Researchers can inspect the report themselves instead of accepting a vendor's word, its advertising or its exaggerated claims. Read more about PeptidePrices.

What we built

• Fresh prices every morning. Each morning at 4 a.m. Eastern we check more than 10,000 listings across 101 compounds. Every listing shows the date it was last checked, so you can judge how current a price is at a glance.
• Certificates matched to each listing. When a certificate of analysis matches the exact vendor, compound, strength and unit, it is attached to that listing. Open as many reports as you need in the on-page viewer without leaving the compound page. The wider library holds 18,403 COAs checked.
• Results at a glance on every COA. Each certificate includes our summary of the reported results: purity, content and identity, plus endotoxin, sterility, heavy metals and fentanyl screens where the vendor ordered those tests, along with the date of analysis.
• Routes back to the source. Read the report on the page first, then verify it yourself. Each COA links to the original certificate as the vendor displays it, and to the issuing laboratory's verification record wherever that lab publishes one.
• Reviews of the labs behind the reports. To corroborate a report, read our hand-written reviews of 45 independent testing laboratories.
• Sorting and filters for buying. Each compound comparison sorts by price or rating and lets you compare any vial size. You can also filter by shipping destination, payment method or verified COAs only.
• One scoring method for every vendor. Each vendor is scored with the rating method described on our trust page, and affiliate status carries no weight in that score.

How to use the PeptidePrices price index

Here is a guide to getting the most out of our peptide price comparison tool.

1. Pick the compound you're looking for. If you are unsure, you can read the research guide on each compound page, written by our co-founders Jack Ryan and Jack Hauck.
2. Open that compound's page.
3. Compare listings from all 299 of our tracked vendors that carry it.
   • If you have shipping, payment or size needs, use the built-in filters to narrow it down.
   • We know you're probably looking for the cheapest price, so the cheapest listings come first: the first 8 on a desktop screen (6 on smaller screens), with the rest one click away.
   • Each listing shows the vendor's PeptidePrices quality rating, which links to its full vendor profile so you can read a detailed review before buying.
4. Save at checkout. We're proud to offer exclusive coupon codes for the large majority of our partner vendors, to save you money at checkout.
5. Check the lab evidence. We list many high-quality vendors, so the choice can be tough. That's why each listing carries the vendor's third-party laboratory COA, matched exactly to that vendor, compound, strength and unit.
   • You can browse hundreds of COAs without leaving the compound page.
   • Every COA is analyzed by our editorial team and checked across the testing panels laboratories offer: purity, content, identity, endotoxin, sterility, microbial, heavy metals and fentanyl.
   • The goal is to help you find the vendor offering the highest quality for the lowest price.
6. Know how fresh the price is. Prices are rechecked every morning at 4 a.m. ET, and every listing shows when it was last checked.