The theory of glycolic acid and niacinamide
There are two skin care products in the world, called glycolic acid (Glycolic Acid) and niacinamide (Niacinamide). The two have their own strengths in skin care, and are often discussed by everyone.

Glycolic acid is a type of fruit acid, which is active. Its molecules are slender, which can run smoothly between the stratum corneum of the skin, loosen the connection of keratinocytes, make old keratin easy to remove, and make the skin surface renew quickly and regenerate. And it can increase the hydration of the skin, replenish water and moisturize, and make the skin moist and shiny. It can also stimulate the synthesis of collagen in the dermis, reduce wrinkles and resist aging, and help the skin tighten and smooth. However, it is strong in nature, and those with sensitive skin use it, or cause discomfort, such as redness, itching, etc. Use it step by step to make the skin gradually adapt.

Niacinamide is a derivative of vitamin B3. It can block the transfer of melanosomes to keratinocytes, lighten spots, lighten skin tone, and make skin bright. And it can strengthen the skin barrier, increase the skin's resistance, lock water and moisturize, and protect the skin from external evil. It can also regulate the oil secretion of the skin, suitable for oily skin, and make the skin refreshing. However, some people use it for the first time, or have intolerance, such as itching and tingling, and use it to slow down the picture.

Glycolic acid is good at exfoliating and stimulating collagen, which is long for anti-aging and skin rejuvenation; niacinamide is longer than brightening skin, protecting screen, and controlling oil, each of which has its own divisions. For those who want to rejuvenate skin and resist aging, glycolic acid may be a good choice; for those who want to brighten skin and control oil, and strengthen screen protection, niacinamide can be accepted. However, the way of skin care, your mileage may vary, when you use it, you should carefully observe the nature of the skin, test the sensitivity, and get good results, so that the skin is healthy and beautiful.