If you want to know whether glycolic acid and retinoic acid can be used together, you must carefully investigate the properties and effects of the two. Glycolic acid belongs to fruit acids and is often used for skin rejuvenation. It can exfoliate, make skin smooth, promote cell renewal, and increase skin luster.

Retinoic acid is mostly used to treat acne and anti-aging skin. It can regulate keratinocyte differentiation, reduce hair follicle blockage, and stimulate collagen production.

However, when using both, be careful. Glycolic acid has thinned the stratum corneum and increased skin sensitivity, and retinoic acid may also irritate the skin. The use of both may cause skin redness, swelling, tingling, and desquamation.

If you want to use it together, you can try it with glycolic acid first, wait for the skin to adapt, and then use retinoic acid in small doses, starting from low concentrations and gradually. Pay close attention to the skin's reaction when using it. If there is any discomfort, stop it and consult a doctor.

In short, the combination of glycolic acid and retinoic acid must be used cautiously, and the pros and cons must be weighed to protect the health of the skin.