How much Quinine is in Polars Tonic Water?
There are 17.3 milligrams of quinine in each 8 fl. oz. serving of Polar Tonic, Polar Diet Tonic, and Polar Tonic Water with Lime. Quinine is what gives tonic water its characteristic bitter taste. Quinine is isolated from the bark of the Cinchona tree that is indigenous to the Andes mountains in Ecuador and Peru. Quinine is also used in medicine for the treatment of muscle cramps and malaria.