Be aware of how much lemon water you drink. Lemon adds flavor and nutrients including protein, fat, carbs, potassium, and folate to water, but consumers want vitamin C.
Lemon juice may damage tooth enamel if drank in excess. Use a straw and rinse your mouth with plain water after drinking lemon water to reduce this risk.
Some people with GERD or acid reflux find lemon juice's acidity worse. Before drinking lemon water, visit a doctor if you have acid reflux.
Lemon water may induce heartburn, indigestion, and upset stomach due to its high acidity. Lemon water is best in moderation for acid-sensitive people.
Lemon increases urine output as a diuretic. Some individuals benefit from this, but excessive ingestion without enough water might dehydrate them.
Phytophotodermatitis may result from lemon juice applied topically and sun exposure. Skin redness, inflammation, or blistering may develop.