Fresh lemon is rich in vitamin C and citric acid, which can beautify the skin, reduce fire, lower blood pressure and help digestion. In addition, it is best to soak lemons in warm water, because high temperature will destroy the effective components in lemons. You can directly soak the washed and cut lemon slices in warm water, and add some honey to taste better. Remember, the temperature of water should not be too high. Lemonade is good, but don't be greedy. Drinking a lot of lemonade every day is easy to hurt the stomach, leading to hyperacidity, especially on an empty stomach.