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Coffee Habits Shaped by DNA Variations, Researchers Find

Whether coffee makes a person anxious or helps boost their memory may come down to their DNA, according to research that suggests further studies on caffeine should be customized to a person’s genetic profile.

A study reported today in the journal Molecular Psychiatry found six genetic variants associated with coffee drinking. The variants help explain why the same amount of coffee can have different effects in different people, said Marilyn Cornelis, the report’s lead author.