Scientists from Osaka University found stroke and heart attack survivors can reduce multiple causes of death and prevent further heart disease events by drinking green tea.
They also found daily coffee consumption helps heart attack survivors by lowering their risk of death after a heart attack and can prevent heart attacks or strokes in healthy people.
Previous research has examined the benefits of green tea and coffee on heart health in people without a history of heart disease or cancer.
In the study, the team analyzed data of more than 46,000 participants. They were asked to complete questionnaires that included information about demographics, lifestyle, medical history and diet.
People were then divided into three groups: history of stroke; history of heart attack; and no history of stroke or heart attack.
Researchers then analyzed the amount and frequency of green tea and coffee consumption.
They found when compared with participants who rarely drank green tea, stroke survivors who consumed at least seven cups of green tea daily lowered their risk of all-cause mortality by approximately 62%.
Researchers did not find a strong association among participants without a history of stroke or heart attack.
Heart attack survivors who drank one cup of coffee a day reduced their overall risk of death by approximately 22% when compared to those who did not regularly drink coffee.
People without a history of stroke or heart attack who consumed one or more cups of coffee a week had approximately a 14% lower risk of all-cause death compared to non-coffee drinkers.
Green tea consumption can prevent further heart attack events in survivors while drinking coffee can prevent such events in healthy individuals.
Researchers note that this study was observational, and the reason why drinking green tea and coffee lowered the risk of heart attack and stroke cannot be determined.
Further research is needed to understand the details in the different effects of green tea and coffee.
If you care about nutrition, please read studies about vitamin that is critical to cancer prevention, and why vitamin K is so important for older people.
If you care about nutrition, please read studies that vitamin C may help treat heart rhythm problem, and green tea may protect your body as a vaccine.
The research was published in Stroke and conducted by Hiroyasu Iso et al.
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