It seems that three thoughts about coffee need to be changed in the future. The Australian online media ‘New Atlas’ recently reported that three notable research findings regarding the controversial topic of coffee were published in 2025. This media outlet stated that these new research results are gaining attention for overturning existing common knowledge about coffee or suggesting specific consumption methods. Here are the details.
First, it was analyzed that drinking coffee in the morning is the best way to lower the risk of death. A research team from Tulane University in the United States published a study on the relationship between the timing of coffee consumption and mortality in the November 2025 issue of the international journal 《European Heart Journal》.
Analyzing data from over 40,000 adults, it was found that those who drank coffee in the morning had a 31% lower mortality rate from cardiovascular diseases compared to those who did not drink coffee. This shows that the health benefits of coffee are deeply related not only to the amount consumed but also to the timing of consumption.
Second, it was revealed that coffee may actually be beneficial for patients with arrhythmia. A research team from the University of Adelaide in Australia and the University of California, San Francisco (UCSF) published related research in the November 2025 issue of the international journal 《Journal of the American Medical Association (JAMA)》.
According to the research results, the group that regularly consumed coffee had about a 39% lower risk of recurrence of atrial fibrillation compared to the group that did not consume any caffeine. This directly contradicts the existing medical notion that coffee exacerbates heart rhythm disorders.
Third, it was found that filtering coffee with paper can lower cholesterol levels. A research team from Uppsala University in Sweden emphasized the importance of the coffee extraction method in the March 2025 issue of the international journal 《Nutrition, Metabolism & Cardiovascular Diseases》.
Paper filters play a crucial role in filtering out compounds called diterpenes that raise bad cholesterol (LDL) levels. The research team advised that if cholesterol management is necessary, drinking well-filtered coffee like drip coffee is much more beneficial for health.
Bone health issues, effects on the kidneys, and whether intraocular pressure rises are still controversial
However, there are still many controversial topics surrounding the efficacy of coffee. Notable examples include bone health issues, effects on the kidneys, and whether intraocular pressure rises. First, opinions in academia regarding bone health are divided. A research team from Shandong University of Traditional Chinese Medicine in China stated in the March 2025 issue of the international journal 《Frontiers in Nutrition》 that moderate coffee consumption can reduce the risk of osteoporosis. On the other hand, research results published in the December 2025 issue of the international journal 《Nutrients》 suggested that excessive coffee consumption could have negative effects on bones. Therefore, discussions about what the appropriate amount of coffee consumption is continue without end.
The impact of coffee on kidney health is also a major issue. Research results published in the July 2025 issue of the international journal 《Scientific Reports》 reported that coffee may help prevent kidney disease. However, a research team from the University of Toronto in Canada emphasized that excessive coffee consumption could negatively affect the kidneys in individuals with certain genes that reduce caffeine metabolism. They particularly urged caution regarding individual differences.
The question of whether coffee raises intraocular pressure has also become a recent controversy. A research team from Aga Khan University in Pakistan warned in a study published in the August 2025 issue of the international journal 《Journal of the Pakistan Medical Association》 that coffee consumption may temporarily raise intraocular pressure. They cautioned that such changes in pressure could be a risk factor, especially for those at high risk for glaucoma.
[Frequently Asked Questions]
Q1. Is it really safe for people with sensitive hearts or arrhythmias to drink coffee?
A1. According to clinical trial results published by the research team from the University of Adelaide and UCSF in the November 2025 issue of the 《Journal of the American Medical Association》, the group that drank coffee had a lower risk of recurrence of atrial fibrillation compared to the group that abstained from caffeine. This overturns the existing notion that coffee causes heart rhythm disorders. However, since individual health conditions and caffeine sensitivities may vary, it is advisable to consult with a healthcare professional.
Q2. If I am concerned about cholesterol, what type of coffee should I choose instead of espresso or capsule coffee?
A2. According to research published by the Uppsala University research team in the March 2025 issue of the 《Nutrition, Metabolism & Cardiovascular Diseases》, paper filters effectively filter out compounds called diterpenes that raise bad cholesterol (LDL) levels. Therefore, if you have high cholesterol or are managing cardiovascular health, drinking well-filtered coffee like drip coffee is much more beneficial than unfiltered extraction methods.
Q3. Do the same effects apply if I drink coffee in the afternoon instead of the morning or sip it throughout the day?
A3. According to data analysis results published by the Tulane University research team in the January 2025 issue of the 《European Heart Journal》, the group that drank coffee in the morning showed the most significant reduction in cardiovascular disease mortality compared to those who did not drink coffee. The research team confirmed that not only the amount of coffee consumed but also the timing of consumption, specifically in the morning, plays an important role in determining health benefits.
