Weight loss will be followed by fatigue and constant tiredness. But in fact it is not due to the work of the brain. The work of thought is done by the human brain alone. And energy is expended in any work. Brain function is no exception. So the question arises , the energy loss that occurs in thinking , is about weight loss. The reason for this is that so little energy is expended in thought that it can be easily ignored. If we think of building energy by burning body fat, then it is not due to the work of the brain. Detailed maps of energy expenditure at different stages of thought are drawn by observing the information obtained with the help of PET (positron emission tomography) scans and MRI (magnetic resonance imaging) of different parts of the brain while thinking about a subject. It has been observed that the use of energy in the process of transmitting signals to the brain is at the level of body cells and atoms. But it creates very little heat. So there is no reason for people to lose weight due to anxiety. However, it is very likely that the human mind is burdened with anxiety and the appetite decreases. And if you play less, you will lose weight.