Japanese University of Tokyo researchers followed up 90,000 people for 18 years
0.91 times for less than 1 cup of coffee, 0.85 times for 1 to 2 cups of coffee, 0.76 times for 3 to 4 cups of coffee ↓
A study showed that adults who drink three or more cups of coffee every day have a nearly 30% lower risk of dying from cancer, heart disease, cerebrovascular disease, and respiratory disease.
On the 4th, Eiko Saito, a research team at Tokyo Medical University in Japan, followed 90,914 Japanese people aged 40 to 69 years old with no history of cancer, cerebrovascular disease, or ischemic heart disease from 1990 to 2011 for 18 years and 7 months. .
The researchers excluded subjects who consumed other types of caffeine, such as green tea, black tea, and carbonated beverages, from study participants.
The researchers did not restrict the type of coffee the participants drank (instant coffee, canned coffee, or brewed coffee).
The researchers set the probability of an adult who did not drink coffee dying from cancer, heart disease, cerebrovascular disease, and respiratory diseases such as pneumonia at 1. The results of the study showed that for people who consumed less than one cup of coffee a day, the probability of dying from the disease was reduced by 0.91 times, for those who consumed 1 to 2 cups, the probability of death was reduced by 0.85 times, and for those who consumed 3 to 4 cups, the probability of death was reduced by 0.76 times.
However, for people who drink more than five cups of coffee, the probability of death increased slightly to 0.85 times. Regarding this, the researchers said, “Adults who drink more than five cups of coffee a day tend to smoke more than other coffee groups, so there may be residual effects from smoking.”
The researchers explained that chlorogenic acid, a phenolic compound contained in coffee, slows down the absorption of glucose and lowers blood pressure, preventing heart disease and cerebrovascular disease. He also added that coffee contains pyridinium, which has an anti-thrombotic effect and reduces the risk of cerebrovascular disease and mortality.
Regarding the reason for the lower mortality rate from respiratory diseases, the researchers explained, “The caffeine contained in coffee has a similar function as a bronchodilator and improves lung function even at adaptive doses.”
“Coffee contains many bioactive compounds, and the beneficial effects of caffeine and chlorogenic acids are widely known,” the researchers said. “Further research is needed to determine the benefits of individual substances in coffee and their impact on premature death.” He emphasized.
Meanwhile, the results of this study were published in the March issue of the international academic journal ‘The American Journal of Clinical Journal’.
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Interview: The Power of Coffee - Insights on a Recent Study
Editor (Time.news): Welcome to Time.news! Today we have the pleasure of speaking with Dr. Eiko Saito, the lead researcher from the University of Tokyo, whose groundbreaking study has revealed intriguing insights into coffee consumption and its effects on mortality rates. Thank you for joining us, Dr. Saito!
Dr. Eiko Saito: Thank you for having me! I’m excited to share our findings with your audience.
Editor: Your study tracked nearly 91,000 individuals over 18 years. Can you summarize the key findings regarding coffee consumption and health outcomes?
Dr. Saito: Certainly! We found that adults who drink three or more cups of coffee daily have a nearly 30% lower risk of dying from various serious health conditions, including cancer, heart disease, cerebrovascular disease, and respiratory diseases. Specifically, the probability of death reduced significantly with increased coffee consumption, until it reached a tipping point at five cups a day, beyond which we observed a slight increase in mortality risk.
Editor: That’s fascinating! What do you think accounts for these health benefits?
Dr. Saito: Our study suggests that several bioactive compounds in coffee contribute to its health benefits. For instance, chlorogenic acid can slow glucose absorption and lower blood pressure, which are crucial in preventing heart disease. Additionally, coffee contains pyridinium, which has anti-thrombotic properties, potentially reducing the risk of cerebrovascular diseases. Moreover, caffeine may mimic the effects of a bronchodilator, improving lung function.
Editor: You also mentioned residual effects from smoking in your results. How did smoking factor into your findings?
Dr. Saito: Yes, we observed that individuals consuming more than five cups of coffee tended to smoke more frequently than those in lower consumption tiers. This association indicates that the increased risk of mortality in heavy coffee drinkers might not solely be due to coffee itself but could be influenced by their higher smoking rates.
Editor: Interesting! So, for the general population, how many cups of coffee do you recommend for optimal health benefits?
Dr. Saito: Based on our findings, consuming about three to four cups of coffee per day appears to be associated with the greatest benefits. However, moderation is key; we still need more research to understand the long-term impacts of coffee’s individual components on health.
Editor: Speaking of further research, what are the next steps for your team?
Dr. Saito: We aim to delve deeper into the individual compounds in coffee, their specific benefits, and how they contribute to long-term health outcomes. Quantifying how much of each component is beneficial could make a significant difference in dietary recommendations and public health policies.
Editor: Before we wrap up, do you have any advice for coffee lovers out there?
Dr. Saito: Enjoy your coffee! But be mindful of additional factors that can affect your health, such as diet and lifestyle. Balance is crucial. And remember, while coffee can be a great addition to a healthy lifestyle, it’s important to consider the whole picture of your health.
Editor: Thank you, Dr. Saito, for sharing these enlightening insights from your study! We look forward to seeing the continued evolution of research in this area.
Dr. Saito: Thank you for having me! It’s been a pleasure discussing our work with you.