Why do people have a sweet tooth?

1. Instinctive reaction.

Studies have shown that the taste of sweetness is the first taste that humans are exposed to after birth, and babies eat breast milk first after birth, and breast milk is sweet, so it is an instinctive reaction to love sweets. And people who often eat sweets will become more and more fanatical about sweets, and the more they eat, the more they love to eat.

2. Dopamine neurons are activated.

When you eat sweets, dopamine neurons in the brain are activated, which then releases a chemical called opioids, which works in a similar vein as morphine. When the brain feels the excitement of this substance, it craves it more, so people will want to eat sweets again after eating them.

3. Replenish energy.

When a person eats sugar, the amount of blood sugar in the body increases, so that insulin converts it into energy for the body. The more sweets you eat, the more energy you have in your body, and the more you feel happy.

I think you asked two questions.

1. People's desire for sweets**.

2. Individual differences in the treatment of sweets.

First one. Most of these problems can be explained by evolutionary theory.

To put it simply, people who love high-sugar and high-fat foods are more likely to survive a possible famine, so humans are born with a sugar-loving gene, and unless there are very special circumstances, no one will dislike sugary foods.

Again. I said I like foods high in sugar, and I avoided using the words "sweet tooth".

I'll start with the differences, I think it's probably really the so-called personal taste, which has something to do with the eating habits of the family since childhood, and I guess it has something to do with everyone's metabolic capacity (and there is a very good correlation between the two).

However, I still think that almost all people like foods that are high in sugar. A lot of our foods are high in sugar, like fruits, peanut butter, some crackers, but they may not feel very sweet, especially with other seasonings like salt, so I've observed that some people who claim to have a dislike for sweets still like this kind of food that is high in sugar but not so sweet.

Someone has done a survey on the U.S. market and found that snacks with higher sugar content sell better, which also confirms that most people like high-sugar foods.

The sweets in Chinese food are so varied and exquisite that they are probably among the best in the world. Foreigners make sweets with pudding, or pastries such as cream and eggs, but each place in China has different characteristics, in addition to candy cakes, there are also all kinds of sweet soups.