On the appropriate sequence of use of glycolic acid and retinol
Skin maintenance, the use of chemical agents, pay attention to the order, related to the effect. Glycolic acid and retinol are both good skin care agents, but the sequence of their use is very meaningful.

Glycolic acid, a fruit acid, has the ability to exfoliate. It can loosen the connection between keratinocytes, causing the aging stratum corneum to fall off, the skin surface to be renewed, and it is smooth and delicate. However, it also makes the skin barrier temporarily weak and becomes more sensitive.

Retinol, a vitamin A derivative, has significant effects in promoting cell metabolism and stimulating collagen production. It can improve skin texture and reduce wrinkles. However, it has a certain degree of irritation to the skin, or causes the skin to redness, dryness, desquamation, etc.

If glycolic acid is applied first, the stratum corneum can be peeled off and the skin permeability increases. At this time, although retinol is more permeable and absorbed, due to its own irritation, the superposition of glycolic acid causes the skin to be weak, and the skin may be overwhelmed, causing symptoms such as allergies and discomfort.

Therefore, it is appropriate to use retinol first and then glycolic acid. Retinol is used first to exert its functions such as promoting metabolism, and because its irritation is relatively weak, the skin can gradually adapt. After the skin adapts to retinol, glycolic acid is used to further optimize the skin condition, achieve better skin care effect, and avoid various problems caused by excessive skin stimulation.

Skin care is delicate and delicate. The order of use of glycolic acid and retinol should be carefully determined according to the skin's characteristics and tolerance, in order to achieve the best purpose of maintaining the skin.