On the method of synergistic use of glycolic acid and retinol
If you want to make good use of glycolic acid (Glycolic Acid) and retinol (Retinol), you must understand its properties and know its method, so that you can get twice the result with half the effort without the risk of skin damage.

Glycolic acid is a fruit acid and the like, which is active and can quickly dissolve the bonding between the cuticles, causing the cuticle to fall off and the skin to be rejuvenated. Its function is to brighten the skin tone, smooth fine lines, and promote metabolism. However, it is strong, and the skin may be uncomfortable when used for the first time, such as tingling and redness.

Retinol, derived from vitamin A, can stimulate collagen production, tighten the skin, treat acne well, and resist skin aging. However, it is also irritating, or cause dry and desquamation of the skin.

The two are used in combination and need to be used step by step. At the beginning, it is recommended to try a single ingredient first to check skin tolerance. First use glycolic acid, which can be used every three days. After cleansing at night, take an appropriate amount and apply it lightly to the face, and let it dry. If the skin is the same, try retinol again, and use it every three days. The usage is the same as glycolic acid.

When the skin adapts to a single ingredient, you can try synergy. To start, apply glycolic acid first. After drying, apply retinol at an interval of 30 minutes. After applying, you can apply a cream to moisturize. If the skin still feels uncomfortable, you need to extend the interval or reduce the frequency of use.

And during the use of both, sun protection is essential. Because it can make the skin sensitive to light, if it is not protected from the sun, it is easy to cause pigmentation. A high-power sunscreen must be used during the day, and parasols, sunglasses, etc. are also indispensable.

In short, glycolic acid and retinol work together. If used properly, it can make the skin radiant, firm and radiant; if used improperly, the skin will be damaged. Therefore, users need to be cautious and find a suitable method according to the skin condition.