
These ingredients can have side effect from skin staining to irritation.
Common ingredients such as vitamin C, AHA and benzoyl peroxide have a handful of ingredients that they don't pair well with, per Allure.
Ingredients to avoid mixing include:
- Vitamin C + Benzoyl Peroxide
- Vitamin C + AHA
- AHA + Hydroquinine
- Hydroquinone + Benzoyl Peroxide
- Benzoyl Peroxide + Dapsone
Using these ingredients together can cause issues such as dullness, skin staining or irritation.