Mao Jian is usually not harmful to the liver, but patients with liver dysfunction should avoid drinking too much. Mao Jian contains certain fatty acids, minerals, vitamins and other nutrients, which can quench thirst and refreshment, and is generally not harmful to the human body. However, Mao Jian contains caffeine, which promotes the decomposition of liver glycogen and increases blood sugar. The liver is an important organ that regulates blood sugar and will participate in the body’s metabolism. Liver lesions will affect the metabolism of blood sugar, liver dysfunction will increase the burden on the liver when drinking too much Mao Jian, affecting the normal function of the liver, so patients with a weak liver should try to drink as little as possible. Therefore, in general, Mao Jian is not harmful to the liver, but liver dysfunction patients drink too much will damage liver function, it is recommended to drink less.