Menthol
Menthol is a compound from peppermint and other mint oils that creates a cooling sensation on the skin and mucous membranes.
What it is studied for
The strongest rated effects first. Bars show the size of the effect, the letter grades the evidence, and each rating lists the studies behind it.
What does that cool feeling mean?
Menthol, a constituent of peppermint oil, activates cold-sensitive receptors. That sensory effect helps explain its appeal in products for discomfort, but a change in sensation does not necessarily mean a change in the underlying problem. 1 2
Why people take it
SuppCo community snapshot, 2026-09-28. Reasons for use are not evidence that it works.
Questions people ask
Does menthol improve airflow?
A small human experiment found no reduction in upper-airway resistance. Cooling and physical airflow are different outcomes. 2
Can it relieve carpal tunnel pain?
One small trial found temporary pain relief after skin application. It did not show correction of the underlying nerve problem. 3
Is menthol the same as peppermint oil?
Menthol is one component of peppermint oil. Evidence about the whole oil does not automatically apply to the isolated compound. 1 4
What if a menthol rub causes blisters?
Health Canada advises stopping the product and seeking medical attention for severe pain, swelling or blistering. 5
Spearmint
Peppermint oil