A method evaluating a skin cleansing composition for an ability to treat a skin condition, can include a) identifying a target skin condition or lack of target skin condition on a skin sample； b) taking a baseline measurement of a Microbial index of Skin Health via a Microbial index of Skin Health Method； c) performing a wash protocol with the cleansing composition via the Wash Protocol Method； and d) taking a second measurement of the Microbial Skin Health Measurement after the Wash Protocol； wherein an increase from the baseline Microbial Skin Health Index of 5 or more signifies the cleansing product is efficacious for treatment of the identified skin condition.
