# Health risks of not eating but drinking water The human body can usually survive for about 3-8 weeks without drinking water or eating, but this approach cannot maintain a healthy state. In fact, even short-term (a few days) complete fasting can begin to have negative health effects.： -**Early stage (1-3 days)**: The body will consume glycogen reserves, and headache, fatigue, and decreased concentration may occur. -**Subsequent stages**: Metabolism changes to the breakdown of fat and muscle, resulting in malnutrition and decreased immune function -**Long-term risks**: electrolyte imbalance, muscle loss, heart problems Please do not try to drink only water and not eat for a long time, this may cause serious health problems. If you are considering fasting or changing your diet, be sure to do so under the guidance of a medical professional. Do you have a specific health goal you want to achieve? I can discuss some safer methods.