Demand splits into three shapes and each needs a different page. Active queries, often with a strength attached, need a page for the ingredient itself that explains the cosmetic use, the common strengths, the vehicles and the tolerance considerations, then lists the products you make at each strength. Concern queries need collections written in the language the shopper uses without crossing into treatment claims, which means describing who a product suits and what it does cosmetically rather than promising to resolve a diagnosed condition. Compatibility queries, which ask whether two actives can be used together, need their own answers page and are among the most linked-to content in the category.
Product pages have to hold the detail those pages promise: the percentage in the title where the brand sells by strength, the full ingredient list as text, the vehicle, the testing described honestly, and a references block that says what was tested, on how many people and for how long, in plain sentences. A dated review line and a named person or standard behind it tells both readers and search engines the page is maintained.
The structural rule that catches brands out is the opposite of the usual one. Different strengths of the same active are different products with different search demand and different tolerance advice, so they get their own pages rather than becoming options on one selector, while pack sizes of a single strength stay as variants. Alongside that, run one claims register: a single approved wording for each claim, used identically on the page, in the feed, in ad copy and on any marketplace listing, so a reviewer anywhere sees the same sentence.