On the use of glycolic acid and retinoic acid
for skin care, the use of glycolic acid and retinoic acid is quite crucial. Glycolic acid belongs to the class of fruit acids and has the power of rejuvenating the skin. It can gently exfoliate the aging keratin on the surface of the skin, making the skin smooth and delicate again, and the color is more uniform.

Retinoic acid can regulate the metabolism of skin cells, promote the production of collagen, help improve skin wrinkles, and improve skin elasticity.

When using both, it is necessary to be cautious. Since glycolic acid has exfoliated, the skin may be in a sensitive state at this time. If retinoic acid is added rashly, it may cause skin intolerance, causing redness, swelling, tingling and other discomfort. Therefore, the method of use should be tried on a small scale first. You can use glycolic acid at intervals of several days first. After the skin adapts, you can add retinoic acid as appropriate. And the initial dosage should be small, observe the skin reaction, and gradually adjust.

Furthermore, during use, sun protection is essential. Both can make the skin more sensitive to ultraviolet rays. If the sun protection is not good, it may cause sunburn and anti-tanning of the skin. Appropriate sunscreen must be applied, and physical sunscreen such as umbrellas and hats are also indispensable.

In short, although glycolic acid and retinoic acid are good skin care agents, they can be used properly to achieve twice the effect with half the effort and keep the skin healthy and bright.