- 1 in 3 adults suffer from high blood pressure. Only half of them know it.
- Hypertension is diagnosed when the systolic pressure is above 140 mmHg and/or the diastolic pressure above 90 mmHg.
- According to the WHO, hypertension is one of the leading causes of premature death worldwide.
For many people, it is difficult to do without coffee. And yet the drink is not always good for your health. A new study, published in Journal of the American Heart Association, reveals that drinking two or more “caouas” a day significantly increases the risk of death from heart disease in people with severe hypertension.
Coffee: no more than one cup a day in case of severe hypertension
Japanese researchers tried to determine the effect of hot drinks on the health of patients with hypertension. For this, they followed more than 6,570 men and 12,000 women aged 40 to 79 for 19 years. The participants had to answer questionnaires about their daily and eating habits as well as their medical history. 842 people died of cardiovascular diseases during the work.
Data analysis shows that people with very high blood pressure (either stages 2 and 3 or 160/100 mmHg or higher) who drank two or more cups of coffee a day had twice the risk of dying from heart disease than non-coffee drinkers.
In contrast, a single cup of the black nectar was not associated with an increased risk of death.
“These results may support the claim that people with severe high blood pressure should avoid drinking too much coffee.”explained the study’s lead author, Dr. Hiroyasu Iso from the National Center for Global Health and Medicine (Tokyo) and Osaka University. “Because people with severe hypertension are more sensitive to the effects of caffeine. Its harmful effects may outweigh its protective effects and may increase the risk of death.”added the expert.
Very high blood pressure: green tea is not a problem
The Japanese team’s work also revealed that green tea consumption is not associated with an increased risk of death from cardiovascular disease.
The benefits of this drink are explained by the presence of polyphenols, which are micronutrients with antioxidant and anti-inflammatory properties found in tea. For the researchers, it is these elements that could partly explain why coffee consumption alone was associated with an increase in deaths in people with severe high blood pressure, even though the two drinks studied contain caffeine. However, they acknowledge that further work is needed to confirm their observations.