Current COA coverage
The newest eligible certificate for each visible vendor–peptide pair, divided by that vendor’s tracked peptide listings.
Compare peptide vendors side by side
Choose two vendors. Compare shared products, observed price per mg, catalog size, and COA coverage. The COA numbers come from records in our index: printed dates, purity fields, laboratory names, and source documents. They cannot verify product quality.
To price several compounds together, use the peptide stack calculator or browse every observed listing on the main pricing page.
Market
Compare vendors
Pick any two vendors to compare pricing, catalog breadth, and COA documentation.
VS
Value vs market
Value on popular
Peptides carried
COA coverage
Choose two vendors to compare them.
How to interpret the comparison
Price and documentation answer different questions
Price per mg helps normalize vial sizes. COA coverage shows which visible products have a current document in our index. Printed dates, laboratory names, lots, and reported purity tell you what each record contains. They do not add up to a product-quality score. Open the source certificates before drawing a conclusion.
Printed within 12 months
Current certificates whose transcribed test date falls within the prior twelve calendar months. Missing dates are not counted.
Reported purity field
The share of current certificates with a transcribed purity value. It measures field availability, not comparative quality.
Vendor comparison questions
- What does current COA coverage mean?
- It is the share of a vendor’s visible peptide listings for which our index has an eligible certificate. We count the newest eligible document for each vendor–peptide pair.
- Does a higher reported purity make one vendor better?
- No. Purity is transcribed from the certificate and results from different laboratories or methods are not directly comparable. A purity value alone does not establish identity, vial content, sterility, endotoxin status, chain of custody, or overall quality.
- Why can two vendors have different laboratory or date coverage?
- Vendors publish different documents, and some certificates omit a laboratory name, test date, lot, or purity field. The comparison describes what is present in our current index, not everything a vendor may have tested.