I'm not buying it. The Brits favor tea while coffee is the drink of choice in the US. Many of our decedents were British. Did the gene mutate crossing the ocean?
http://www.cnn.com/2014/10/07/living/coffee-consumption-dna-link/index.html?hpt=hp_t4
You can blame that third cup of Joe on your genes.A recent study has found six new genetic variants that could dictate the volume -- and frequency -- of a person's daily coffee consumption.
According to the National Coffee Association's 2014 drinking trends study, 61% of American adults consume coffee on a daily basis.
http://www.cnn.com/2014/10/07/living/coffee-consumption-dna-link/index.html?hpt=hp_t4