On the superposition of nicotinamide and glycolic acid
Wen Fu's skin care method, the superposition of ingredients requires caution. Niacinamide and glycolic acid are both commonly used ingredients in skin care, but the superposition of the two has advantages and disadvantages, which cannot be ignored.

Niacinamide has many functions. It can block the transfer of melanin, brighten the skin, and rejuvenate its luster; it can also strengthen the skin barrier, making the skin firm and elastic. If there is a strong wall in the city, it can resist the invasion of external evil. Glycolic acid is a type of fruit acid, which has excellent exfoliation power, can smooth the skin, fade fine lines, and make the skin like a new lotus, delicate and dripping.

However, if the two are superimposed, there is also a risk. Glycolic acid thins the stratum corneum and greatly increases the permeability of the skin. At this time, the superposition of nicotinamide may cause intolerance to the skin, causing redness, tingling, and itching. If the delicate flower encounters a strong wind, it cannot be disturbed by it.

If you want to superimpose the two, you should first check the tolerance of the skin. Those with strong skin may try it. Start with a low-concentration product first, nicotinamide can start from 2%, and glycolic acid can start from 5%. Take an appropriate amount of the product, try it behind the ear or on the jaw in a small area, and observe it for 24 to 48 hours. If there is no discomfort, it can be used on the face And the frequency of use should be slow, once a week at the beginning, until the skin adapts, and then increase the number of times.

When using, there is also a sequence. After cleansing, the skin is still moist, first apply toner as a base, then apply niacinamide products thinly, and then use glycolic acid products until it is absorbed into a film. In this sequence, it is still smooth water to be stable.

It is also used during the day, and strict sun protection is required. Glycolic acid makes the skin more sensitive to ultraviolet rays. If it is not well protected, it will cause skin damage. If there is no helmet, it will be exposed to the hot sun.

In short, the superposition of nicotinamide and glycolic acid is like a double-edged sword. If used properly, it can achieve good skin care effects; if used carelessly, it will hurt the skin. Therefore, users should be cautious and find suitable methods according to the nature of the skin to achieve the purpose of skin care.