Hunger is a feeling formed in the cerebral cortex, and the key is how this feeling is formed.

Because the brain does not store blood sugar, it is very sensitive to the change of blood sugar concentration. When it is quiet, more than half of the blood sugar is supplied to the brain.

When people are hungry, the blood sugar concentration begins to decrease, and this slight decrease is immediately perceived by some sensitive sensory cells, and the "news" is transmitted to the cerebral cortex, where a "hunger feeling" is formed. This is a reminder that "I should replenish energy (blood sugar)".

If you don't eat in time, the excitement generated by the cerebral cortex will cause the secretion of corresponding hormones, which will prompt glycogen stored in the liver to be "quickly" converted into glucose (that is, blood sugar) and released into the blood, so the blood sugar concentration will be restored. The brain is "full" but not "hungry", which is why we are not hungry when we are too hungry.

So I won't lose weight in the short term. Only when the liver "glycogen" is gone, the glycogen in muscle will be utilized, and finally it will consume fat if it is not enough.

Therefore, the way of dieting to lose weight is difficult to have any effect in the short term.