Menthol doesn't lower the temperature of your mouth at all. It creates the sensation of cold by binding to a protein channel called TRPM8 — the body's primary cold sensor — and forcing it open exactly as chilly air would. The nerve signal that results is indistinguishable, to your brain, from touching ice. That single trick explains mint gum, cooling beverages, and a whole category of engineered "cooling agents" that food scientists tune for potency and staying power. Synthetic agents such as GIV1, GIV2 and WS-3 all exploit the same receptor, but with measurably different strength and duration — which is precisely what makes them useful.
The Body's Cold Sensor: TRPM8
TRPM8 is a protein channel sitting in the membranes of sensory nerve cells, and it is the body's microscopic cold detector. In March 2026, a team led by Seok-Yong Lee at Duke University Medical Center, publishing in Nature Communications and presented through the Biophysical Society, captured the first close-up structural view of how this channel senses both chilly temperatures and menthol. Their work shows that TRPM8 integrates cold and menthol through overlapping but non-identical networks within the protein — meaning menthol genuinely uses the cold machinery, just not in exactly the same way temperature does.
As the chemical company BASF explains in its science communication on menthol, these thermoreceptors are specialized to respond to cold or heat stimuli and continuously sense ambient temperature. When menthol docks onto a cold receptor, it produces the same nerve stimulus as contact with cold water. The mirror image also exists: capsaicin, the hot component of chili peppers, binds a heat receptor and creates warmth without any real temperature change. Your mouth is, in effect, running a chemical simulation of temperature.
