Q: Can retinol be superimposed on glycolic acid?

A: Retinol and glycolic acid are both commonly used ingredients in skin care. Glycolic acid is a fruit acid, which can accelerate keratin metabolism, make skin smooth and delicate, and promote collagen production. Retinol can regulate the growth and differentiation of skin cells, improve fine lines and brighten skin tone.

However, when using the two in combination, caution should be taken. Glycolic acid thins the stratum corneum of the skin and enhances skin permeability. If retinol is superimposed at this time, it may cause skin irritation to intensify. The skin may be red, swollen, tingling, peeling and other discomforts.

If you insist on superimposing, you should start with low-concentration products and use them at intervals. For example, use glycolic acid at night, and retinol every other night. At the beginning of use, pay close attention to the skin reaction. If the discomfort is significant, stop using it immediately, and consult a professional dermatologist for advice. In short, the superposition of skin care ingredients depends on skin tolerance to ensure safety and achieve the ideal skin care effect.