A new study has found that drinking two or more cups of coffee a day may double the risk of dying from heart disease for people with very high blood pressure. This applies to individuals whose blood pressure is 160/100 mm Hg or higher.
On the other hand, drinking just one cup of coffee a day or regularly drinking green tea did not show any increased risk of dying from heart disease—even though both drinks contain caffeine.
This research helps us better understand how coffee might affect heart health, especially for people with severe high blood pressure.
Previous studies have shown mixed results about how coffee affects the heart. Some reports have suggested that drinking moderate amounts of coffee may actually help reduce the risk of heart attack or stroke. Coffee has also been linked to some health benefits like better mood, improved alertness, lower appetite, and even a reduced risk of chronic diseases.
But too much coffee can cause problems. It may raise blood pressure, make people feel anxious, cause a racing heart, or lead to trouble sleeping.
In this study, researchers grouped blood pressure levels into five categories. These included normal levels (less than 130/85), high-normal, mild high blood pressure (140–159/90–99), and more severe levels (160/100 or higher). Grade 2 and Grade 3 hypertension were considered severe.
The study followed more than 18,000 men and women aged 40 to 79 for nearly 19 years. During this time, there were 842 deaths related to heart disease.
The results showed that people with severe high blood pressure who drank two or more cups of coffee daily had about twice the risk of dying from heart disease compared to those who didn’t drink coffee.
However, people who drank only one cup of coffee a day did not have a higher risk, no matter what their blood pressure was. Green tea drinkers also did not show any increased risk in any blood pressure group.
This means that people with severe high blood pressure should be careful about drinking too much coffee. Since their bodies may react more strongly to caffeine, the risks might outweigh the benefits.
Green tea, however, might be a safer choice. This could be because green tea contains polyphenols, which are plant-based nutrients known to reduce inflammation and fight damage in the body.
In conclusion, while coffee may have some health benefits for many people, it may pose a risk for those with serious blood pressure problems. Talking to a doctor and keeping an eye on your blood pressure could help you make safer choices when it comes to caffeine.
If you care about blood pressure, please read studies about unhealthy habits that could increase high blood pressure risk, and eating eggs in a healthy diet may reduce risks of diabetes, high blood pressure.
For more information about blood pressure, please see recent studies that early time-restricted eating could help improve blood pressure, and results showing 12 foods that lower blood pressure.
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