Shampooing familial 2en1

We rank results with INCI-level analysis first, then fall back to the strongest active matches and closest alternatives so every product page still shows comparable options. Fallbacks stay within closely related product families, so cleansers are matched with cleanser-like alternatives instead of unrelated makeup or body products. Active Match % measures shared science-backed actives. Formula Similarity % measures total ingredient overlap when full INCI lists are available.