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Home / Health News / Tea or coffee your genes will decide: Study

Tea or coffee your genes will decide: Study

The findings showed that people who were more sensitive to caffeine and were drinking a lot of coffee consumed low amounts of tea.

By: Agencies   | | Published: November 16, 2018 6:45 pm
Tags: Alcohol  Caffeine  Genes  Tea  Vegetables  
coffe & tea
Bitterness acts as a natural warning system to protect us from harmful substances.©Shutterstock

Are you a tea or coffee person? The answer may lie in your genetic predisposition towards bitter tastes, say, researchers. Also Read - Caffeine: Is it safe to consume it everyday? Find out

It could be because bitterness acts as a natural warning system to protect us from harmful substances. Also Read - Dry January: Why giving up on alcohol in 2021 is a good idea?



The study, led by researchers from US-based Northwestern University, and QIMR Berghofer Medical Research Institute in Australia, explored reactions to three bitter substances — caffeine, quinine and propylthiouracil (PROP) — to understand how they affect people’s preference for drinking tea, coffee and alcohol. Also Read - Diabetes diet: Does caffeine in coffee and tea affect your blood sugar levels?

The findings showed that people who were more sensitive to caffeine and were drinking a lot of coffee consumed low amounts of tea.

In other words, people who have a heightened ability to taste coffee’s bitterness — and particularly the distinct bitter flavour of caffeine — learn to associate “good things with it”.

“You’d expect that people who are particularly sensitive to the bitter taste of caffeine would drink less coffee,” said Marilyn Cornelis, assistant professor of preventive medicine at Northwestern University Feinberg School of Medicine.

“The opposite results of our study suggest coffee consumers acquire a taste or an ability to detect caffeine due to the learned positive reinforcement (stimulation) elicited by caffeine.”

The study, published in the journal Scientific Reports, also found that people sensitive to the bitter flavours of quinine and of PROP — a synthetic taste related to the compounds in cruciferous vegetables — avoid coffee.

For alcohol, a higher sensitivity to the bitterness of PROP resulted in lower alcohol consumption, particularly of red wine.

“The findings suggest our perception of bitter tastes, informed by our genetics, contributes to the preference for coffee, tea and alcohol,” Cornelis said.

Scientists applied Mendelian randomisation — a technique commonly used in disease epidemiology — to test the causal relationship between bitter taste and beverage consumption in more than 4,00,000 men and women in the UK.
 

Published : November 16, 2018 6:45 pm
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