Find tonic water bitter? Part of your brain may be on the small side

gin and tonic

Sweet or bitter?

EyeEm / Alamy

Here comes a taste test with a surprising outcome. A study involving 1600 people found the volume of a particular brain region is reversely linked to how bitter people find tonic water.

Before anyone thought to mix it with gin, tonic water was developed as a treatment for malaria. It contains a medicinal substance called quinine, which gives tonic water its bitterness. Previous studies have found that individuals perceive the strength of bitter flavours like quinine differently depending on their genes.

Daniel Hwang at the University of Queensland in Australia …