Lemon water is best made with cold water to avoid inactivation of nutrients such as vitamin C, malic acid as well as citric acid in it. Lemon is a fruit, mainly contains vitamin C, citric acid and other nutrients, people usually drink lemon water, on the one hand, in order to increase the flavor of lemon in the water, on the other hand, is to get the vitamin C and other nutrients. Vitamin C and other vitamin nutrients are more afraid of heat, heat will decompose, so it is best to use cold water. In addition, lemons contain organic acids and amino acids and other substances, after hot water soaking, it is possible to destroy the components, resulting in lemon bitter. It is recommended to be as light as possible when making lemon water, and a common amount is one lemon in one liter of water. However, it is important to note that if you are allergic to lemons, you are prohibited from drinking lemon water.