The health effects of coffee are always controversial. Coffee contains more than 1,000 kinds of chemicals because each ingredient has a different mechanism of action. Experts say coffee may or may not help depending on your health condition and your illness. Recently, Korean researchers published a study that showed no link between coffee consumption and high blood pressure.
The research team, which included Han Min-jung, a family medicine specialist at Myongji Hospital, and Myung Seung-kwon, a graduate president of the National Cancer Center International University, conducted a study to find out the correlation between coffee intake and high blood pressure. It is a meta-analysis of 13 cohort studies published in international journals from 2002 to 2021. Meta-analysis is a study in which individual research results are collected and statistically re-analyzed in order to integrate multiple research results on a specific research topic into one.
As a result of the analysis, 64,000 patients with high blood pressure were confirmed out of a total of 310,000 study subjects. A total of 13 cohort studies showed that the correlation between coffee intake and hypertension was not statistically significant.
"Recently, coffee consumption lowers the risk of diabetes, some cancers (hepatic cancer, breast cancer, colon cancer), Parkinson's disease, but increases the risk of low-weight childbirth, miscarriage, and dyslipidemia," said Graduate School President Myung Seung-kwon. "The risk of blood pressure varies from previous meta-analysis, which is thought to include population differences, unpublished methods."
Previously, several studies conducted in the United States and other countries have reported that drinking coffee lowers the risk of high blood pressure. However, studies conducted in Europe and Asia and meta-analysis conducted according to various factors such as gender, caffeine presence, smoking, and follow-up period have found that they are not relevant.
The components of coffee related to blood pressure are caffeine and chlorogenic acid. Caffeine contracts blood vessels and exhibits an immediate blood pressure increase, but chlorogenic acid can suppress blood pressure rise caused by active oxygen species through antioxidant action, thereby exhibiting an antihypertensive effect. "This effect of chlorogenic acid is thought to be the reason why coffee consumption does not increase the risk of high blood pressure," said Myung Seung-kwon, dean of graduate school. "However, excessive coffee consumption should be avoided."
Writer: Grace Jun
(Picture from Unsplash)
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