According to research published in the open-access, peer-reviewed Journal of the American Heart Association, drinking two or more cups of coffee a day may increase the risk of death from cardiovascular disease among patients with severe high hea (160/100 mm Hg or more) compared to non-coffee drinkers (JAHA).
In contrast, despite the fact that both drinks contain caffeine, the study, which involved more than 18,600 men and women in Japan, found that drinking one cup of coffee or one cup of green tea every day did not increase the risk of death from cardiovascular disease at any blood pressure measurement.
The Food and Drug Administration (FDA) of the United States estimates that an 8-ounce (240 ml) cup of green or black tea contains 30–50 mg of caffeine, while an equivalent cup of coffee contains more like 80–100 mg.
One cup of coffee per day may lessen the chance of mortality for heart attack survivors, according to prior study, and it may also help healthy people avoid heart attacks or strokes.
Other studies have suggested that regular coffee consumption may help control appetite, lower the risk of depression, increase alertness, and reduce the risk of chronic diseases like Type 2 diabetes and some cancers. However, it is unclear whether these effects are caused by caffeine or something else in coffee. On the negative side, drinking too much coffee can increase blood pressure, cause anxiety, heart palpitations, and make it harder to fall asleep.
Hiroyasu Iso, professor emeritus at Osaka University, is the study’s senior author. “Our study aimed to determine whether the known protective effect of coffee also applies to individuals with different degrees of hypertension; and also examined the effects of green tea in the same population,” he said.
To the best of our knowledge, this is the first study to identify a link between daily coffee consumption of two or more cups and mortality from cardiovascular disease in individuals with severe hypertension.
When the amount of blood pushing against the blood vessel walls is continually too high, high blood pressure, also known as hypertension, results, making the heart work harder to pump blood. Hypertension is defined as a blood pressure value of 130/80 mm Hg or greater according to the American College of Cardiology and American Heart Association’s most recent blood pressure recommendations.
Source: Indian Express
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