There are 30 genes that are responsible for bitter taste perception, one of them being TAS2R32. Different variations of this gene affect ability to detect bitter compounds, like for example feniltiocarbamids and glucosinolates. About 25% of people lack ability to detect these compounds due to gene mutations. Are you like them? Maybe you don’t like broccoli, because it tastes too bitter? The cause is probably hiding in your genes. Furthermore, a connection between smokers and alcoholics and inability to detect bitter taste was clearly shown too.
More information about genetic testing for traits & talents.