Whether you like coffee or not, caffeine when consumed changes the way the brain and body and works. It is a central nervous system stimulant that enters the bloodstream and remains there for a few hours, stimulating the brain and other nerves of the body. People experience unhealthy side effects even long after the caffeine is no longer present in the blood, like headaches, nervousness and rise in blood pressure.
Have you ever wondered, however, why some people can drink 5-6 cups of coffee per day and experience no side-effects whereas you, the minute you have a second cup in a day sleep becomes a true burden for instance?
Well, once again it is all down to genetics. A new research led by Harvard School of Public Health and Brigham and Women’s Hospital, identified why coffee has different effects on different people. More specifically, scientists conducted an analysis of more than 120,000 regular coffee drinkers of European and African American ancestry.
What they found was genes and genetic variants that were strongly associated with habitual coffee drinking. In particular, these findings suggest that people adjust their coffee intake based on what best suits them. Even though, their apparent effect is quite small, variations in such genes according to Marilyn Cornelis, research associate in the Department of Nutrition at Harvard School of Public Health and lead author of the study “may allow us to identify subgroups of people most likely to benefit from increasing or decreasing coffee consumption for optimal health”.
So, in the future, based on your genetic profile the amount of coffee you drink can be altered for optimal health benefits, like during pregnancy were women are advised to consume only moderate amounts of caffeine because of risk of miscarriage and preterm birth.
Source: Medical Daily