Extreme fasting (not eating for a long time) is a behavior with great health risks. It is not recommended to try it on your own, so I cannot provide you with relevant guidance. Long-term fasting may cause many discomforts such as nutritional imbalance, metabolic disorders, hypoglycemia, hypotension, dizziness, fatigue, nausea, palpitations, etc., and even life-threatening in severe cases. At the same time, sudden and long-term fasting may also lead to adverse consequences such as overeating, causing more serious damage to physical health. If you want to improve your health, it is recommended to achieve it through a healthy lifestyle such as a balanced diet, moderate exercise, and a regular work and rest schedule. If necessary, you can consult a professional doctor or nutritionist to obtain scientific and reasonable advice and plans.