Skin is a special organ in human body that have function for maintain human health. One of skin’s function is to protect human by physical barriers, biomolecules and skin pH. Normal skin has an acidic pH, with pH value of 4,1-5,8. Increase of pH value can causing pathogenic microorganism growth. At the pH value 6 there is an increase of Propionibacterium acnes (P. acnes) which is contrib…