The appearance of food can stimulate neurons in hypothalamus and increase or decrease people's appetite; Color psychologists believe that because there are not many blue foods in nature, blue foods are unnatural and will reduce people's blood pressure and appetite. The reason why blue food helps to lose weight is that blue food can make people's brains secrete hormones that refuse to eat, which not only greatly reduces people's appetite, but also slows down the speed of eating and produces a sense of fullness.

Although blue food has a calming effect, eating too much will have small sequelae, just like being too calm may make people feel depressed. When enjoying blue food, you can put some yellow things to reconcile.

In Japan, some people use this to introduce slimming powder, that is, grinding soybeans into powder, and then adding blue food coloring, which looks like a toxic blue chemical. People who need to lose weight can add this powder to various foods, such as soup, rice, bread, vegetables and so on. It will not change the taste of food at all, but will make people involuntarily reduce their appetite. All kinds of delicious food even look a bit like mold. Blue dining table decoration has the same effect.

Because there are few blue foods in nature, we can still use some tips, such as putting the food on a dark blue plate as far as possible, and the supporting tableware is blue; Or replace the light in the refrigerator with a blue light bulb, which invisibly reduces your desire for food and achieves the effect of slimming; Or, buy a pair of popular blue sunglasses.

There are not many blue foods in nature. Blueberries are one of them. There is also a rare blue-purple potato and some berries. In addition, creatures in nature have the instinct to avoid eating toxic food. When humans first foraged in primitive times, they regarded blue, purple and black as potentially lethal food colors and would not try them easily.