Want to Loose Fat? Caffeine May Help Burn Fat and Lower Diabetes Risk, Says New Study

Researchers link higher blood caffeine levels to lower body fat and reduced type 2 diabetes risk, suggesting calorie-free caffeinated drinks may offer health benefits.

May 10, 2025: A new study from an international team of researchers suggests that higher levels of caffeine in the bloodstream could be linked to lower body fat and a reduced risk of type 2 diabetes. The research, conducted by scientists at the Karolinska Institute, University of Bristol, and Imperial College London, used genetic data to draw a more conclusive link between caffeine and metabolic health.

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According to the study, individuals with genetically predicted higher plasma caffeine concentrations were found to have a lower body mass index (BMI) and whole-body fat mass. Furthermore, these individuals also showed a reduced risk of developing type 2 diabetes, with roughly half of that effect attributed to the impact on BMI.

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“Caffeine appears to influence metabolism by increasing energy expenditure, enhancing fat burning, and suppressing appetite,” the researchers noted. They estimate that a daily intake of 100 mg of caffeine may raise energy use by approximately 100 calories—potentially lowering obesity risk.

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Though the researchers caution that the study was based on two genetic markers and limited to people of European descent, the findings align with existing evidence of caffeine’s effects on metabolism.

They also point to the observed inverse relationship between coffee consumption and type 2 diabetes in other studies, suggesting that caffeine could be a contributing factor.

The study, published in March 2023, concludes by calling for randomised controlled trials to explore whether non-caloric caffeinated beverages could be used as a tool to help combat obesity and diabetes.

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caffeine health benefits, caffeine and diabetes, caffeine fat burning, Karolinska Institute, University of Bristol, caffeine metabolism, BMI reduction, diabetes prevention, genetic research, non-caloric drinks