Menthol CAS:2216-51-5 Menthol is a compound extracted from peppermint leaves and peppermint oil that has a cooling feel and smell. In skin care products, menthol is often added in the form of essential oils, fragrances, or synthetics. Menthol plays multiple roles in cosmetics, such as: 1. Soothe skin. Menthol has a very sedative effect and can effectively relieve skin discomfort and reduce symptoms such as itching and redness. 2. Reduce inflammation and relieve itching. Menthol has a significant improvement effect on skin inflammation, can effectively reduce bacterial growth, and improve inflammation and acne problems. 3. Control oil and remove acne. Menthol can regulate sebum secretion, which is beneficial for oily skin and acne problems. It can effectively control oil secretion and make the skin fresher. 4. Antioxidant. Menthol can also treat different skin conditions, such as sunburn, wrinkles and premature aging, and prevent skin infections. 5. Promote penetration. Menthol can promote the transdermal absorption of hydrophilic and lipophilic compounds, helping other ingredients in cosmetics to work better.