Natural sugar-free tonic / Lemonardo Tonic, 330ml. The tonic was invented to fight malaria in India and Africa. At one time, soldiers of the British East India Company mixed tonic with gin to score the sharp taste of quinine, so the popular gin-tonic cocktail appeared to this day. Thanks to quinine, the tonic has strong sobering and anti-hangover properties. However, this tonic does not contain quinine because it is made on the basis of grapefruit peel extract, the bitterness of which is given by another substance - naringin. Naringin and hesperidin are among the most famous citrus flavonoids. They have a unique ability to improve the elasticity and throughput of blood vessels. Thus, they can be indicated for the prevention of cardiovascular diseases. They also activate the liver, have an anti-inflammatory effect.