Recently, a study by Yale University School of Medicine proved that junk food with high sugar and oil can really bring happiness to the brain. It is found that the brain has different reward circuits for sugar and lipid, and foods with high oil and sugar may trigger two mechanisms, namely, the super-additive effect of 0.5+0.5 > 1.
A long time ago, in the era of hunting and gathering, humans rarely had the opportunity to eat sugar and fat together. A meal is mainly fruit or meat. Over time, the human brain has evolved two different reaction mechanisms: one is suitable for sugar and the other is suitable for lipid. Therefore, when someone accidentally eats sugar and fat together, these two reward circuits work together in the brain, and finally they enjoy a better pleasure than eating any nutrient alone.
When we eat a potato chip with crispy outside and cotton inside, dopamine will be secreted in the brain, which will make us eat more, and a pleasant N-fold spiral eating method of potato chips dipped in ice cream, mayonnaise and vinegar sauce will be exhibited. But we may forget in the whirlpool of pleasure that the fat content of a bag of China potatoes may exceed one-fifth of the daily value of fat.
This kind of food is very popular with people of all ages, but we also know that fried food is generally very unhealthy and it is very easy to produce some unhealthy substances. And fried products may be fried many times.
It is likely to change the quality and lead to unhealthy food, so many people think that fried chicken is junk food, but even so, it is difficult to stop foodies from pursuing food.