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If you are convinced to drink bitter coffee or hop beer because you like the taste, new research could prove that you are wrong.
According to a scientific study, our preferences for bitter or sweet drinks are not based on our taste genes, but rather on the badociation with what they make us feel.
Researchers were looking for genetic reasons for our taste for beverages, as this could help find ways to intervene in people's diets.
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Drinks are an important part of our daily consumption – sugary drinks could contribute to obesity and oral health, while alcohol is badociated with more than 200 diseases and accounts for about 6% of all deaths in the world.
The study was led by Marilyn Cornelis, badistant professor of preventive medicine at the Feinberg School of Medicine at Northwestern University.
"The genetics that underlie our preferences is related to the psychoactive components of these beverages," she said.
"People like what coffee and alcohol make them feel, that's why they drink it, it's not their taste."
The results were published today in the scientific journal Human molecular geneticsand show that there are important behavioral-rewards components in the choice of drinks.
Research found a genetic marker: people who had a variant of the FTO gene – the same variant previously linked to a lower risk of obesity – actually preferred sugary drinks.
"It's counterintuitive," said Professor Cornelis. "FTO is a mysterious gene and we do not know exactly how it is related to obesity.It probably plays a role in the behavior, which would be related to weight management."
Victor Zhong, postdoctoral researcher in Northwestern Preventive Medicine and co-author of the study, said: "To our knowledge, this is the first genome-wide badociation study of beverage consumption based on the perspective of taste.
"It is also the most comprehensive genome-wide badociation ever done on the consumption of beverages."
The researchers followed approximately 336,000 people to record their beverage consumption and conducted a genome-wide badociation study of bitter beverage consumption and that of sugary drinks.
"Bitter" beverages include coffee, tea, grapefruit juice, beer, red wine and other spirits, while sugary drinks include non-alcoholic beverages and grapefruit-free juices.
Earlier this week, separate research found that the consumption of sugary drinks was not necessarily related to childhood obesity.
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