Dono low-pH actives ek saath use karne se irritation badh sakta hai, isliye inhe alag rakhna safer hai.
Subah ek active use karo, shaam ko doosra use karo, ya phir alternate days par lagao.
Oily aur acne-prone Indian skin ke liye BHA PM mein aur vitamin C AM mein lagana zyada practical aur effective hota hai.