It is not recommended to try fasting therapy with only drinking water. This extreme fasting method may cause serious damage to the body, including malnutrition, metabolic disorders, electrolyte imbalance, organ dysfunction, and even life-threatening. If you have health needs or want to manage your health, it is recommended to adopt a scientific, reasonable, safe and moderate diet adjustment and fasting plan under the guidance of a professional doctor or nutritionist, such as staged light fasting, to ensure that your health is improved while protecting your body. Please do not try this extremely risky single fasting behavior lightly. You must put your own health first and choose a safe and reliable way to maintain your health.