Hello for working for
ผลัดเซลล์ผิว of
BHA does not need to work at low pH, it can work at pH above 4, so the formula doesn't need to adjust the pH.
ผลัดเซลล์ผิว with the formula, the pH must be adjusted to lower the pH level not more than 3.5 will be suitable for work.
ผลัดเซลล์ผิว of the hydroxy acids group (
AHA ,
BHA , PHA)