Chewing Mint Gum Doesn't Actually Make Your Water Colder, It Just Feels That Way. ... The reason for the thermal illusion that results when mint flavoring is mixed with water is linked to a single protein known as transient receptor potential cation channel subfamily M member 8 (TRPM8), also
The main chemical in mint gum, methanol, acts as a "cooling agent" that tricks your sensory nerves into thinking that there's something cold in your mouth. Then, when you do drink a glass of water, your brain thinks that this temperature is extra cold and your throat feels like you just swallowed an iceberg.