The health effects of drinking only water and not eating every day are very serious, and it is not recommended that anyone try this extreme diet. Here are some key points： 1. **Short-term impact**： -**Insufficient energy**: The body needs to get energy (calories) from food. If you do not eat, the body will quickly consume stored glycogen, and then begin to break down fat and muscles for energy. -**Fatigue and weakness**: Lack of energy can lead to fatigue, dizziness, inattention and weakness. -**Electrolyte imbalance**: Skipping meals may cause imbalance of electrolytes (such as sodium and potassium), causing muscle spasms, irregular heartbeat and other problems. 2. **Long-term effects**： -**Malnutrition**: Long-term failure to eat can lead to severe malnutrition and lack of essential vitamins, minerals and protein. -**Organ damage**: The body will begin to break down the protein of important organs (such as the heart and liver), which may lead to organ failure. -**Impaired immune system**: Malnutrition weakens the immune system and increases the risk of infection and disease. 3. **Survival time**： -A person can usually survive **1 to 2 months** without eating and drinking only water, but this depends on the individual's health, weight and water intake. -However, this extreme method can cause irreversible damage to the body and even endanger life. 4. **Health advice**： -If you are considering dieting or losing weight, please consult your doctor or dietitian to develop a scientific and healthy eating plan. - Maintaining a balanced diet and adequate intake of protein, carbohydrates, fats, vitamins and minerals are the key to maintaining health. In short, drinking only water without eating every day is very dangerous and should never be tried. A healthy lifestyle requires a reasonable diet and moderate exercise.