If your mom is a big coffee drinker, odds are you are too. And it’s not just because you learned by example. A recent study published in PLos Genetics journal found a link between genes and the amount of coffee people drink.
Apparently scientists were able to identify two genes that seem to determine how much caffine people intake. Those people with the genes consumed around 1/3 of a cup of coffee (or one can of soda) more than those without them.
That may not seem like a lot, but considering 90% of the U-S population are coffee drinkers it’s a small insight into our behavior. Further research is planned.
SOURCE: Coffee drinking in your genes?
Buff Broad 
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