Compatibility of Activated Resorcinol S with AHA and Comparison of Whitening Ingredient Combinations

Based on the staff's reply:

Regarding the use of Activated Resorcinol S (water-soluble) with AHA:
Any type of resorcinol cannot be used in highly acidic conditions, which is characteristic of formulas containing AHA. AHA formulas typically require a pH of 3-3.5 for efficacy, while resorcinol needs a pH above 4.5 for stability. Therefore, resorcinol and AHA cannot be used together in the same formulation.

Regarding the comparison between B3 + NAG + Activated Resorcinol and B3 + NAG + MSH White Absorb:
The staff cannot definitively say which combination is better. The effectiveness depends on the individual user's skin response. Some ingredients may work well for some users but not for others.