On the superposition of glycolic acid and lactic acid,
Fuglycolic acid and lactic acid are both commonly used acids for skin rejuvenation. However, the superposition of the two needs to be carefully considered.

Glycolic acid, its molecules are small and highly permeable. It can easily penetrate into the surface of the skin, effectively peel off aging cuticles, making the skin texture more delicate and brighter in color. Long-term moderate use can promote collagen regeneration and slow down the aging process of the skin.

Lactic acid is relatively mild and has moisturizing properties. It can adjust the acid-base balance of the skin, maintain the skin's hydrated state, and help the skin maintain a good metabolism.

If you want to use glycolic acid and lactic acid in combination, you should first pay attention to the tolerance of the skin. Those with delicate skin may cause discomfort, such as redness and tingling. Therefore, use low concentrations first to observe the skin's reaction. If the skin adapts well, then gradually adjust.

The timing of stacking is also critical. Usually apply glycolic acid first, and then use lactic acid after it works on the skin and stays for a while. This sequence can first use the exfoliating power of glycolic acid to pave the way for better absorption of lactic acid and its moisturizing and balancing effects.

Furthermore, the frequency of use should not be too high. Combined use or single use is more irritating. It is advisable to set a reasonable use cycle according to the skin condition to prevent excessive irritation and ensure skin health.

In short, superimposing glycolic acid and lactic acid, if the method is proper and the operation is prudent, can achieve better skin rejuvenation effect. However, if you do it inadvertently, it may damage the skin. Users should take the skin as the foundation and try carefully to get good results.