If you're one of those people who can't go a day without multiple cups of coffee, your genes might be the reason why.
A new large-scale study involving several hundred thousand people from the USA and UK reveals that the love for coffee, particularly mocha, is a hereditary trait.
This genetic predisposition is also connected to metabolism and the risk of developing addictions.
An international team of researchers analyzed the genetic data and coffee consumption habits of more than 360,000 participants from the 23andMe biobank in the USA and the UK Biobank.
The results showed strong correlations, suggesting that a fondness for coffee is indeed hereditary.
Genetic Factors
The researchers identified seven specific genetic variations that were more common among coffee lovers.
Notably, two genes, CYP1A1 and CYP1A2, were highlighted.
These genes are involved in metabolism and allow individuals to absorb caffeine more quickly, explaining why some people can consume large amounts of coffee without adverse effects.
"As we expected, the decision to consume coffee is partly influenced by an individual's genetic makeup. We were even able to identify with high confidence specific genes that influence coffee intake, including some that have a bearing on how quickly caffeine is absorbed," said study lead author Hayley HA Thorpe to Medical Xpress.
Links to Metabolism and Addiction Risks
The study also found that the genetic markers associated with coffee consumption are linked to a higher risk of obesity and addiction to substances like nicotine, cannabis, and alcohol.
This suggests that the same genetic factors influencing coffee preference might also affect other aspects of health and behavior.
However, the researchers caution against drawing conclusions about coffee's impact on health based solely on this study.
They emphasize that while genetics play a role in coffee consumption, they cannot definitively say whether coffee contributes to obesity or addiction.
But for now, coffee lovers can take comfort in knowing that their preference for a daily cup of mocha is not just a habit but part of their genetic makeup.
