https://pmc.ncbi.nlm.nih.gov/articles/PMC4171909/
Evaluation of pH of Bathing Soaps and Shampoos for Skin and Hair Care - PMC
Normal healthy skin has potential of hydrogen (pH) range of 5.4-5.9 and a normal bacterial flora. Use of soap with high pH causes an increase in skin pH, which...
soaps and shampoos