This formula should not be used on sensitive, peeling or compromised skin. Please refer to the additional sun protection notes and other warnings in the provided directions.
The pH of this formula is approximately 3.6. Glycolic Acid has a pKa of 3.6 and pKa is the most important aspect to consider in formulating with acids. pKa describes the acidity of a molecule. When pKa is close to pH, there is an ideal balance between salt and acidity, maximizing effectiveness of the acid and reducing irritation