Both can be used but glycolic acid ผลัดเซลล์ผิว better than Citric Acid due to the size of the molecule. ผลัดเซลล์ผิว also use glycolic acid but if you only want to adjust the pH, use Citric Acid because it's much cheaper.if you want to adjust the ph value in the formula AHA gel or toner lower (2.5-3.5) should use glycolic acid or Citric Acid Good
Using it at a normal rate (1-3%) does not result in a heavy or thick texture.more Beta Glucan (Saccharomyces cerevisiae extract) when mixed in the formula Will it make the texture heavier or more sticky?