Quinine is a bitter compound that comes from the bark of the cinchona tree. It was originally developed as a medicine to fight malaria. The tree is most commonly found in South America, Central ...

Tonic water is a soft drink containing quinine, which gives it a bitter taste. Quinine is a common treatment for malaria. Some people believe that it can also help with leg cramps and restless legs ...

Deep in the Andean rainforest, the bark from an endangered tree once cured malaria and powered the British Empire. Now, its derivatives are at the centre of a worldwide debate. Where to see the rare ...