Transparent by design.
Your preferences narrow the options. The evidence keeps the result in context.
First: choose the right category
Cosmetic and collagen-product interests can use nonmedical preference matching. General science and medical/research interests lead only to educational material and primary-source links. They do not create a personalised treatment or drug-shopping funnel.
Hard exclusions come first
Products must be active, verified and available, with documented market eligibility. The engine then applies category, destination, ingredient-exclusion, fragrance and budget conditions. A USD budget does not silently convert other currencies. Ingredient-name matching is not allergy screening.
Then: preference ranking
Remaining products are sorted by matching interests, preferred format and routine complexity. The default weights are 3 for an interest match, 2 for a format match and 1 for a simpler routine match. Owners can edit weights; the hard verification gates cannot be switched off. No medical confidence percentage is generated.
An honest no-match result
If no verified product meets the rules, the tool says so and offers educational next steps. It does not substitute an unverified listing. Your questionnaire answers remain in the current browser tab and are not sent as analytics events.
Comparing label prices
The comparison utility divides an entered package price by its total labelled mass or volume. It requires compatible units and a single currency. It does not calculate injectable doses, clinical benefit or how often a person should use a product.