Drinking lemon water for 7 days may mainly increase your fluid intake, which can help you feel more hydrated. Some people may notice lighter bloating or feel that digestion is easier, but the source does not show strong proof that lemon water alone causes major health changes in one week.
Lemon juice contains citric acid, which may help raise urinary citrate. This can be useful for some people who form certain kidney stones, especially when lemon juice is diluted in plenty of water. However, the evidence is mostly based on people with kidney stone risk, not healthy adults drinking lemon water for 7 days.
Lemon water is acidic, so frequent sipping or drinking it on an empty stomach may irritate sensitive teeth. Repeated acid exposure can also contribute to enamel wear over time, especially if the drink is strong or held in the mouth.
Use lemon water as a simple drink, not as a detox or treatment. Anyone with reflux, tooth sensitivity, or a history of kidney stones should ask a doctor or registered dietitian for personalized advice.