Can nicotinamide and glycolic acid be used in combination?
Doctors can understand the principles of the skin and understand the properties of various medicines. Niacinamide and glycolic acid are both used for skin care, but the superposition of the two is related to the health of the skin and cannot be ignored.

Niacinamide has a peaceful sex and many benefits for the skin. It can prevent melanin from moving to the epidermis, making the skin even, radiant and radiant; and it can strengthen the skin barrier, reduce moisture loss, and make the skin moist. Glycolic acid, a type of fruit acid, has tiny molecules, can enter the deep layers of the skin, dissolve interkeratinous bonds, promote exfoliation, new skin is raw, can smooth acne marks, light wrinkles, and make the skin smooth and delicate.

However, the two should be superimposed with caution. Glycolic acid sensitizes the skin and increases the possibility of nicotinamide irritation. If the skin is already sensitive and superimposed rashly, it will cause redness, swelling, tingling, and itching. Therefore, before superimposing, it is advisable to test for sensitivity. Take a little nicotinamide and glycolic acid products, apply them behind the ear or on the inside of the forearm, and wait for 24 hours. If there is no discomfort, you can try superposition.

The method of superposition is also exquisite. At the beginning, use nicotinamide first, because it is mild and can protect the skin, and then use glycolic acid, and start from a low concentration, gradually increase the dosage and frequency. For example, in the first week, glycolic acid is used every two days, and after adaptation, it can be used once a day. Or use it in the morning and evening, niacinamide in the morning to protect against daytime damage; glycolic acid in the evening to repair the skin at night.

In short, niacinamide and glycolic acid are superimposed. If used properly, you can get the effect of beautifying the skin; if you are not careful, you may hurt the skin. The way of skin care is more prudent, and your mileage may vary to achieve the ideal state.