Why Does Spicy Food Burn?

From hot sauce to curry, spice is a staple in many cultures around the world. However, have you ever wondered why spicy food burn your tongue? Keep reading to find out!

You are not actually burning your tongue, it is actually chemical compound called capsaicin. Capsaicin is a compound in chili peppers that cause the burning sensation. The compound attaches to receptors called TRPV1 and stimulated nerve endings causing the “burn.” There is some controversy of how and why TRPV1 senses the spice. TRPV1 are used to detect hot foods in terms of temperature, not spice. This is why people start sweating when having spicy food because their brains think that you are overheating. How odd!

Capsaicin is not a taste like sweet, sour, or salty; it is just a sensation. This sensation is the same when you eat mustard. However, the burning sensation can be felt in different places. When you eat mustard, the molecules end up in your sinuses while chili pepper molecules stay in your mouth.

Hirasa, Kenji, and Mitsuo Takemasa. Spice science and technology. CRC Press, 1998.

Fitzgerald, Maria. "Capsaicin and sensory neurones—a review." Pain 15.1-4 (1983): 109-130.

Rosca, Adrian Eugen, et al. "Capsaicin and gut microbiota in health and disease." Molecules 25.23 (2020): 5681.