Performance evidence brief
Menthol mouth rinsing is a cooling strategy used before or during hot-weather endurance work. The claim is perceptual cooling rather than nutritional fuel.
Menthol rinsing can improve thermal perception and may help endurance performance in hot conditions, but it is a narrow heat-use tool.
Heat-exercise reviews: menthol mouth-rinsing may improve performance, but study counts are small.
Evidence is route-specific: mouth rinse, ingestion, and topical menthol are not interchangeable.
Better thermal perception can mask rising body temperature, so hydration and heat-safety planning still matter.
Source Drawer
The score reflects evidence that the supplement does its stated job. Some jobs are direct, such as strength, endurance, or recovery; others are indirect, such as sleep, mood, appetite, or health support. A real effect can still receive a cautious practical rating when dose, safety, product quality, or audience fit remain uncertain.
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