Menthol is a concentration of oils derived from peppermint and other types of mint. It can also be made synthetically.

In personal lubricants, menthol serves several functions. It creates a tingling, cooling sensation when applied to the skin, and lubes with menthol are often marketed as sexual enhancers. Menthol can also act as a mild anesthetic. It is a safe substance, but people with mint allergies should avoid lubricants that use organic or synthesized menthol.