Drinking two or more cups of coffee a day can double the risk of death from cardiovascular disease in people with very high blood pressure (160/100 mm Hg or higher), but not the same risk for people with heart disease. blood pressure measurements, according to research published in News Medical & Life Science citing the Journal of the American Heart Association.
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Only one cup.. pros and cons
In contrast, the study found that drinking one cup of coffee and consuming green tea a day did not increase the risk of cardiovascular disease-related death at any blood pressure measurement, even if both beverages contained caffeine. According to the FDA, one cup of green or black tea contains 30-50 milligrams of caffeine, while one cup of coffee contains about 80-100 milligrams.
Previous research has revealed that drinking a cup of coffee a day can help heart attack survivors by reducing the risk of death after a heart attack and can prevent heart attacks or strokes in healthy individuals. Separate studies have also suggested that drinking coffee regularly may reduce the risk of chronic diseases, such as type 2 diabetes. It also helps control appetite, as well as reduce the risk of depression or increase alertness. Though it’s not clear whether this effect is due to the caffeine or something else in the coffee. But on the harmful side, excessive coffee consumption leads to high blood pressure, increased stress and anxiety, heart palpitations, and difficulty sleeping.
blood pressure
High blood pressure occurs when the force of the blood pushing against the blood vessel walls is consistently too high, forcing the heart to work harder to pump blood. It is measured in millimeters of mercury. Current blood pressure guidelines from the American Heart Association and the American College of Cardiology classify hypertension as a blood pressure reading of 130/80 mm Hg or higher.
But the blood pressure criteria for this study differed slightly from the ACC/AHA guidelines, as the researchers classified blood pressure into five categories: optimal, normal (less than 130/85 mmHg), normal (130-139/85 -89 mmHg) and hypertensive Grade I (140-159/90-99 mmHg), Grade II (160-179/100-109 mmHg) and Grade III (over 180/110 mmHg).
In this study, blood pressure measurements in grades II and III were considered severe hypertension. Over nearly 19 years of follow-up (through 2009), 842 cardiovascular disease-related deaths were documented.
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Important results
The researchers revealed that an analysis of the data for all participants demonstrated the following:
• The association of the consumption of two or more cups of coffee a day with a double risk of death from cardiovascular disease in people with blood pressure equal to or greater than 100/160 mm Hg compared to those who did not drink coffee.
• Drinking one cup of coffee a day was not associated with an increased risk of death from cardiovascular disease in any blood pressure category.
• Green tea consumption was not associated with an increased risk of cardiovascular disease in any blood pressure category.
Avoid excessive
“The study findings may support the claim that people with severe elevated blood pressure should avoid drinking a lot of coffee.
And because people with very high blood pressure are more sensitive to the effects of caffeine, the harmful effects of caffeine may outweigh its protective effects and possibly increase the risk of death.
Benefits of green tea
The study found that people who consumed coffee frequently were more likely to be younger, current smokers, eat fewer vegetables, have higher total cholesterol levels, and lower systolic blood pressure (the highest number) regardless of blood pressure category. sanguine.
The benefits of green tea are explained by the presence of polyphenols, micronutrients with healthy antioxidant and anti-inflammatory properties present in plants. The researchers noted that polyphenols may be part of the reason coffee consumption alone is associated with an increased risk of death in people with severe hypertension, even though both green tea and coffee contain caffeine.
