What it is
Menthol is the characteristic component of mint oils and produces a familiar cooling sensation by stimulating cold-sensing receptors in the skin. In cosmetics it is added to impart a fresh, cooling feel and a minty scent, which is common in gel and stick sunscreens marketed for a refreshing application. It is used at low levels and contributes sensory effects rather than UV protection.
Safety & warnings
Used at low concentrations menthol is generally well tolerated, but it can be irritating or sensitizing for some people, especially on compromised or sensitive skin, and the cooling effect may sting on freshly shaved or broken skin. It functions in part as a fragrance/sensory material, so fragrance-sensitive users should be aware of it. It is not considered comedogenic.
Origin & sourcing
Can be either natural, isolated from peppermint and other mint (Mentha) oils, or produced synthetically; both forms are used in cosmetics.
History
Menthol has long been isolated from mint and used for its cooling and aromatic qualities, and it remains widely used across personal care, oral care, and topical products.
Questions everyone asks
Why does menthol feel cool on the skin?
It activates cold-sensing receptors in the skin, creating a cooling sensation without actually lowering the skin's temperature.
Can menthol irritate sensitive skin?
Yes, some people find it irritating or stinging, particularly on sensitive, broken, or freshly shaved skin, so caution is warranted for reactive skin.