Lemons can't be drunk the next day after soaking for one night. The main nutrient in lemon water is vitamin C, which will be ineffective after one night. It is not recommended to drink any more. Soaking lemon in water has the effects of stimulating appetite, promoting digestion, fading spots, whitening and caring skin. However, when lemon is soaked in water for one night, due to its high oxidation, citric acid easily reacts with air to form precipitation. But also produce a lot of germs and microorganisms, so try to avoid drinking. This can effectively prevent diarrhea, abdominal pain and other abnormalities.