On the Suitability of Using Niacinamide and Glycolic Acid
In recent times, the method of skin care has gradually flourished. Glycolic acid and niacinamide are both used for skin care. However, there are different opinions on the order of use of the two, so there are different opinions.

Glycolic acid is a type of fruit acid, which is active. It can loosen the connection between keratinocytes, promote the metabolism of the stratum corneum, and rejuvenate the skin. It often improves skin quality, fades pigmentation, and smooths the skin. However, it is intense, or causes short-term discomfort to the skin, such as tingling and redness.

Niacinamide is a vitamin B derivative. It can reduce yellow gas, shrink pores, maintain skin stability, and help repair the skin barrier. It is a good skin care product.

As for whether nicotinamide can be used after glycolic acid, it should be carefully investigated. If the skin has strong tolerance, use glycolic acid first, wait for the skin to adapt, and then use nicotinamide. The two may be synergistic. Glycolic acid initiates the skin's rejuvenation, and nicotinamide can then stabilize and repair, which can achieve the effect of skin beauty.

However, those with sensitive skin should be careful. Glycolic acid has caused slight damage to the skin. At this time, use nicotinamide, or increase irritation. Although nicotinamide has many benefits, it also has occasional intolerance, which is superimposed with glycolic acid, or overburdens the skin and exacerbates discomfort.

Therefore, if you want to use these two, first examine the nature of the skin. Those with strong tolerance should use them in sequence, or get the best effect; those who are sensitive should test their sensitivity first, or consult a professional person to determine a safe method, so as to ensure the health of the skin and get the right way of skin care.