On the compatibility of retinol serum and glycolic acid
The combination of ingredients is related to efficacy and skin comfort. Among them, the compatibility of retinol serum and glycolic acid is quite concerned by everyone.

Retinol serum is rich in vitamin A alcohol, which is effective in skin metabolism, collagen generation and differentiation, and regulation of the stratum corneum. It can make the skin firm, smooth, remove wrinkles and light spots, and glow. Glycolic acid is a type of fruit acid, with tiny molecules and strong penetration. It can loosen the adhesion between keratinocytes, accelerate keratin shedding, smooth pores, brighten skin tone, and improve skin quality.

However, the two are used together, so you need to be cautious. Retinol and glycolic acid are both irritating. If they are not compatible properly, they can easily cause sensitive and uncomfortable skin, such as redness, itching, tingling, desquamation, etc. The reason is that retinol can accelerate the metabolism of the skin and thin the stratum corneum, while glycolic acid also acts on the stratum corneum. The superposition of the two will increase the irritation to the skin.

If you want to use them together, you should first understand your own skin type. Those with strong skin tolerance can try it step by step. At the beginning, use it alone, wait for the skin to adapt, and then use it at intervals. For example, use glycolic acid products first in the evening, and then use retinol serum after a few hours interval; or try it with a low concentration first to observe the skin reaction. After there is no abnormality, increase the amount or shorten the interval. If the skin is sensitive and fragile, it is advisable to consult a professional, or give up the same use.

In short, although retinol serum and glycolic acid are effective, the compatibility needs to be carefully considered. Only by using them reasonably according to your skin type can you receive the good effects of skin care and ensure the health of your skin.