How PepIndex is funded

Some of the outbound links to vendors on this site are referral links. If you follow one and go on to buy something, PepIndex may earn a commission from that vendor. It costs you nothing extra — and where a vendor gives us a discount code, using it generally makes your order cheaper, not dearer.

Not every vendor has such an arrangement. When one does not, the link simply points to the vendor’s own site. Either way, the link works the same and leads to the same place.

This is the part that matters. A vendor cannot pay to rank higher, and a referral arrangement can never move a score. That is not a promise we ask you to take on trust — it is enforced in the code. The scoring function is not allowed to see whether a vendor is a partner: the affiliate field is structurally excluded from its input, and the build fails if anyone tries to pass it in.

Every score is computed only from published, sourced evidence — the testing, the certificates, the business and commercial facts recorded on each vendor’s profile — by the rubric published in full on the methodology page. If a partner vendor ranks well, it is because its documentation earned it.