1. Disrupt metabolism. A study in the magazine "Obesity" shows that junk food can affect metabolism. After 12 healthy college boys ate high-fat food for 5 days, the efficiency of the muscles in converting glucose into energy was significantly reduced. This change is easy to

Cause metabolic disorders.

2. Eating high-sugar foods that are prone to fatigue means that blood sugar will increase rapidly, stimulating a large amount of insulin release, mobilizing the body to quickly consume glucose, and blood sugar will drop sharply. Such fluctuations in blood sugar levels can easily make people feel tired and irritable.

3. Arteries narrow. Eating fast food will quickly damage the arteries.

A Canadian study showed that when a perfectly healthy man ate a meal high in saturated fat, his artery walls narrowed by 24% two hours after the meal, which may lead to high blood pressure and potential heart problems.

4. Causes malnutrition? Today’s young people love to eat sweets, which can easily cause children to feel full and lose their appetite when eating.

Drinking drinks before meals will dilute gastric juices and affect the digestion and absorption of food.

Since there are almost no proteins, vitamins, minerals and other nutrients in sweets, in the long run it will inevitably lead to malnutrition, affect growth and development, and cause diseases such as iron deficiency anemia.

5. Disrupt the balance of intestinal flora. Scientists recently discovered that feeding mice high-fat food will change the composition of the intestinal flora. Certain pathogenic bacteria will increase in reproduction and probiotics will decrease, preventing the intestines from sending "eat full, stop eating" signals to the brain.

"The nerve signals lead to overeating and affect the health of the digestive system.

Extended information: Reasons for addiction to eating junk food: Researchers from the University of Calgary in Canada conducted experiments on mice and found that high-calorie foods increased dopamine levels in the ventral tegmental area, the reward area of ??the brain, prompting the mice to ask for more food.

Researchers fed rats enough high-sugar and high-fat food for 24 hours. Two days later, the rats' desire for such food increased and their consumption increased.

When they injected insulin into this area, the mice had less desire for the food.

Stephanie Berglund, one of the researchers, said that their experiments showed that short-term intake of high-calorie food can induce future eating behavior, and "targeting this (brain) circuit (ventral tegmental area)

Insulin may be a way to curb food cravings."

The research report was published in the monthly journal Proceedings of the National Academy of Sciences.

The researchers believe that this finding may also apply to people, hoping to find a way to treat obesity.