What is the ph of human skin?

Variable skin pH values are being reported in literature, all in the acidic range but with a broad range from pH 4.0 to 7.0. In a multicentre study (N = 330), we have assessed the skin surface pH of the volar forearm before and after refraining from showering and cosmetic product application for 24 h. read more

Your skin is fairly acidic, which helps it ward off the advances of harmful bacteria and fungi. The optimal pH of human skin is 5,5 and you can measure it with a piece of litmus paper. Your sweat with the sebum on your skin to form something called an acid mantle, which has a pH of 4 to 5.5. read more