Caffeine dependence is all in the genes

Study has found that men who possess certain genes are prone to caffeine-seeking behaviour

Shelley Page, The Ottawa Citizen (Canada)

A University of Toronto study has shown that there is a genetic basis for caffeine-seeking behaviour.

While stopping short of calling it "caffeine addiction," researcher Ahmed El-Sohemy said men who possess certain dopamine-receptor genes experience an elevated mood after consuming a caffeinated beverage.

The study was based on 600 students from the University of Toronto who were asked to document their reactions to caffeine and provide samples of their blood.

Men who experience this elevated mood seek out caffeine to continue to feel elation. Those who don't report elevation of mood might be less vulnerable to caffeine dependence, Mr. El-Sohemy said.

The same genetic link has so far not been found in women.

More >>