1, spicy is not a taste, but a pain.

Any spicy food is indispensable to a substance called capsaicin, which is the active ingredient in pepper. Because of this, your tongue will experience a burning sensation. When capsaicin stimulates the pain receptors in the tongue, it will send a pain alarm to the brain, at the same time, the temperature of the tongue will rise, and the sensory organs of the whole body will receive pain signals.

2. Why do some people eat coriander and taste like soap?

Whether you like coriander or not seems to be a matter of personal preference, but research has found that this preference is actually related to heredity. A gene called OR6A2 can make people feel the presence of acetaldehyde, and soap also contains acetaldehyde. This coincidence may explain why some people think coriander smells like soap.

3. Why is the fish fishy and smelly?

The fishy smell of fish mainly comes from a substance called trimethylamine, which is secreted by many marine organisms to reduce the temperature of body fluids. Animals and plants also secrete trimethylamine when they are decomposed by microorganisms.

4. Why did the food once hated become delicious?

The answer is that our taste buds are constantly changing. People's taste buds will gradually disappear with age. There are many smells that we think are "tasting", but they are actually felt through olfactory receptors. Taste buds don't regenerate when they get old, so the elderly are no longer sensitive to taste, and the older they get, the more they like "heavy-flavored" food.

5. Why do you want to fart after eating beans?

The sugar in beans is mainly a large number of oligosaccharides, but this sugar can not be digested and absorbed by the digestive system of human body, so it reaches the large intestine intact through the small intestine. The bacteria decompose to produce unpleasant sulfur and methane, which are discharged as waste gas.