I purchased this toner because of the good reviews on there. The acids in this toner are to low to use as a chemical exfoliant so I use this toner before I apply my AHA's or BHA's. It's perfect to prep your skin for the aha and bha as it lowers the ph of your skin. Using this toner as a prep for acids I really noticed a difference in my skin. I feel like my acids are working better because I'm getting better results using this as a prep than I got when I didn't use this toner. Will repurchase this one!