Your coffee habit may be written in your DNA

Why is it that some people crave several cups of coffee a day while others stop at only one or two? A growing body of evidence suggests that the amount of coffee we consume is determined by our genetic makeup rather than the amount of sleep we got the night before. Coffee is one of the most popular beverages worldwide, second only to tea and water, researchers say. And drinking hefty amounts of coffee has been associated with several health benefits. Recent reports have linked coffee consumption with improvements in short-term memory, as well as a reduced risk of developing multiple sclerosis, melanoma, Type 2 diabetes and liver cancer.