Someone asked today: "Can I use peptide serum and glycolic acid in combination?" The right answer is: Peptide serum and glycolic acid should be used in combination, and it must be used with caution. Glycolic acid has the ability to exfoliate and sensitize the skin. Peptide serum is rich in various active peptides, designed to nourish and repair. Using both may increase the risk of skin irritation. If the skin has strong tolerance, you can try it on a small area of skin first to see if it is uncomfortable. If the skin is red, itchy or tingling after use, it should be stopped immediately. And when using it, it should start with a low concentration and gradually increase it. At the same time, strictly observe the skin moisturizing and sun protection to prevent skin damage. In short, the use of both should be determined according to personal skin characteristics. If in doubt, consult a professional medical beauty professional.