A recent study by scientists from the University of California San Diego uncovered genetic factors that play a role in how much coffee people drink, and what it could mean for their health. Scientists identified seven specific genetic markers associated with coffee intake.

The study delved into how these genetic factors relate to various aspects of health and lifestyle, as reported by the study, published in Neuropsychopharmacology. Researchers examined data from more than 130,000 US-based participants who provided genetic information through 23andMe, a genomics and biotechnology company. By comparing data with the UK Biobank, which includes genetic information from over 334,000 individuals, researchers found consistent genetic links between coffee consumption and higher rates of substance use and obesity in both datasets.

There were also differences between the groups. In the 23andMe data, drinking more coffee was genetically linked to higher rates of psychiatric issues, pain sensitivity, and gastrointestinal problems. These links were less clear or even opposite in the UK Biobank data. Additionally, while the 23andMe group showed a negative association between coffee drinking and cognitive abilities, the UK Biobank data suggested a positive connection.

Using advanced statistical methods, researchers further explored these relationships. They found that people genetically predisposed to drink more coffee also tended to have higher odds of traits related to obesity and red blood cells. However, these associations varied depending on which dataset was analyzed.

This study underscores the complex interplay between genetics, coffee habits, and health outcomes. It also highlights how differences in populations and cultures can influence these genetic links. 

Coffee is the second most consumed beverage globally, after water, and is the second-most-exported commodity in the world after oil. It is estimated that 2.25 billion cups of coffee are consumed worldwide daily. In Mexico, the annual per capita coffee consumption stands at about 796 g. The country boasts 15 coffee-producing states, with Chiapas being the largest producer, contributing 41.0% of the national volume, followed by Veracruz and Puebla.