A study in Obesity magazine shows that junk food will affect metabolism. 12 healthy college boys eat high-fat food for five days in a row, and the efficiency of converting glucose into energy is obviously reduced, which is likely to lead to metabolic disorder.

2, easy to fatigue

Eating high-sugar food means that blood sugar will increase rapidly, stimulate the release of insulin in large quantities, mobilize the human body to consume glucose quickly, and then the blood sugar will drop sharply. This fluctuation of blood sugar value is easy to make people feel tired and irritable.

3. narrowing of arteries

Eating fast food can quickly damage arteries. A study in Canada shows that when a completely healthy man eats a meal with high saturated fat, his arterial wall narrows by 24% two hours after the meal, which may lead to high blood pressure and potential heart problems.

4, causing malnutrition?

Today's young people love sweets, which can easily cause children to feel full and lose their appetite when eating. Drinking drinks before meals will dilute the gastric juice and affect the digestion and absorption of food. Because there are almost no nutrients such as protein, vitamins and minerals in sweets, it will inevitably cause malnutrition, affect growth and development, and cause diseases such as iron deficiency anemia in the long run.

5, destroy the balance of intestinal flora

Scientists have recently discovered that feeding mice with high-fat food will change the composition of intestinal flora. Some pathogenic bacteria will multiply and probiotics will decrease, which will prevent the intestinal tract from sending a neural signal of "eat enough and stop eating" to the brain, leading to overeating and affecting the health of the digestive system.

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Reasons for eating junk food addiction:

Researchers at the University of Calgary, Canada, experimented with mice and found that high-calorie foods can increase dopamine levels in the ventral tegmental area of the brain, which plays a rewarding role, prompting mice to ask for more food. The researchers fed the mice with enough high-sugar and high-fat food within 24 hours. Two days later, the mice's desire for this kind of food increased and their consumption increased.

After they injected insulin into this area, the mice's desire for this food decreased. Stephanie Bergland, one of the researchers, said that their experiments showed that short-term intake of high-calorie foods can induce future eating behaviors, and "insulin administration targeting this (brain) circuit (ventral tegmental area) may be a way to suppress food craving".

The research report is published in the monthly journal of the National Academy of Sciences. Researchers believe that this discovery may also apply to people, hoping to find a cure for obesity.

References:

Junk food hurts the whole body, and the artery narrows after two hours of full meal-People's Daily Online