Comparison guides

Read a listing, compare its price, and know what to confirm with the vendor.

On this page

Compare the same form, size, and package
Use the full listing to distinguish a vial, capsule bottle, spray bottle, or raw powder before comparing totals.
Read an offer from price to checkout
Understand the displayed price, code exceptions, promotion quantities, and charges that may still apply.
Read a vendor's COA in context
Keep the product, batch, report, and vendor statement together when reviewing testing documentation.

Looking for a quick answer? See the FAQ. Our testing information explains what PeptideSpend does and does not check.

For laboratory research-use catalog comparison. Not for human or animal consumption. Not medical advice.