If you want to use nicotinamide after glycolic acid, there must be a reason. Glycolic acid has the power of rejuvenating the skin, can exfoliate the exfoliation, make the skin rejuvenate, or make the skin slightly sensitive. Niacinamide can repair the skin barrier, reduce redness and inhibit inflammation, regulate fat and control oil. If the two are used properly, they complement each other.

Use glycolic acid first, wait for the skin to rest for a while, or apply nicotinamide every once in a while. In this way, after the glycolic acid rejuvenates the skin, nicotinamide can protect the skin, make it safe and moist, and achieve twice the effect with half the effort. When using it, pay attention to the skin's response. If there is any discomfort, it is advisable to stop and consult a professional before