Coffee—one of the world’s most popular drinks—continues to prove its health value, according to a new international study.
A paper recently published in the medical journal BMC Medicine shows that a daily coffee habit can effectively help protect against two common midlife health threats: obesity and osteoarthritis. These conditions often become a major concern for people over 50, significantly affecting quality of life and indirectly contributing to other health problems.
Based on preliminary evidence, a team of researchers from the UK, Denmark, the U.S., Switzerland, and Greece—led by Dr. Loukas Zagkos of Imperial College London and Dr. Héléne T. Cronjé of the University of Copenhagen—investigated coffee’s impact on these two conditions.
Coffee was chosen because it is one of the most widely consumed beverages globally, easily integrated into everyday diets, and has already been shown to offer various health benefits.
The study analyzed data from over 177,000 people with osteoarthritis and more than 649,000 controls, aged 47–71 years.
The results revealed that people with higher plasma caffeine levels—a reflection of regular coffee drinking—had a 10% lower risk of developing osteoarthritis compared to those who rarely or never drink coffee.
About one-third of coffee’s positive effect on osteoarthritis was found to be indirect, through its impact on reducing obesity. People who drink coffee regularly tend to have a lower Body Mass Index (BMI) than non-drinkers, even when their diet and lifestyle are otherwise similar.
Obesity is well known to worsen joint inflammation and damage. The higher the plasma caffeine level—indicating higher intake of coffee, tea, or other caffeine-rich sources—the lower the BMI observed.
This finding aligns with previous research showing that beneficial compounds in coffee can enhance metabolism, promoting fat burning and weight reduction.
The researchers conclude that maintaining a regular coffee habit is an easy, accessible strategy to help protect health as we age. On a broader scale, the widespread popularity of coffee could help reduce the global burden of obesity and osteoarthritis, particularly as the world’s population grows older.