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Which Tea Good For Heart Disease Prevention? Coffee is the most popular beverage in the world, but tea has been enjoyed by people from different cultures in many countries for more than 5,000 years. With significantly lower caffeine than coffee, tea has some health benefits because of compounds known as catechins and epicatechins. These compounds belong to flavonoids that account for around 60 percent of all polyphenols. Research suggests that flavonoids help suppress inflammation that in turn may reduce plaque buildup inside arteries. In a paper published in June 2012 in journal ‘Food & Function’, researchers from the University of Western Australia reported that black and green tea may lower the risk of coronary heart disease and stroke by 10 percent to 20 percent. Furthermore, tea protects LDL (low-density lipoprotein) particles from becoming oxidized that could cause plaque buildup in the arteries leading to atherosclerosis. In general, popular tea like black tea, white tea, green tea, and Oolong tea are made from the Camellia sinenses shrub. They are different because of the way in which they are processed. White tea is the least processed and is made from buds and certain leaves of the Camellia sinensis plant that are steamed and dried. Green tea is made from freshly harvested leaves, which are then steamed to prevent oxidation or oxygen exposure. Oolong tea is allowed to oxidize for a short period, and black tea is completely oxidized. Degree of oxidation does affect the health-promoting components, and the caffeine contents.
So, which type of tea can provide the best overall
health benefits? It all depends on whether one is on medication and one’s
caffeine sensitivity.
Green tea contains the most catechins. Clinical studies on drinking green tea have found that it helps lower LDL cholesterol and triglycerides. Epigallocatechin-3-gallate (EGCG) in green tea is the most studied and most bioactive for heart benefits. It can help prevent atherosclerosis, and boost metabolism helping to make it easier to achieve and maintain a healthy weight. In addition, green tea helps improve the function of endothelial cells in blood vessels. A study of more than 90,000 Japanese participants published in the March 2015 journal ‘Annals of Epidemiology’ revealed that drinking green tea is linked to a lower risk of heart disease and death from heart attack or stroke. Although black tea may not have as many polyphenols as green tea, the changes in its polyphenols during the oxidation process produce a set of unique compounds that have their own heart-health benefits. Findings from a clinical trial indicated that people who drank 3 cups of black tea per day for 12 weeks had, on average, had a 36-percent lower triglyceride levels and a 17-percent improvement in their cholesterol profiles. In another study published in 2012, researchers reported that people who drank 3 cups of black tea per day for 6 months had both systolic and diastolic blood pressure lower that could reduce the risk of cardiovascular disease. Oolong tea is a traditional Chinese tea and it accounts for only 2 percent of tea consumption around the world. Despite its less popularity, it still has a variety of benefits. In a study that involved 76,979 Japanese individuals who aged between 40 and 79 years and were free of stroke, coronary heart disease and cancer at entry, researchers found that those who drank 8 oz (240 ml) or more of Oolong tea per day had a 61 percent lower heart disease risk. The same study also reported positive effect of drinking coffee and green tea. The findings were published in 2011 March’s issue of ‘Journal Epidemiol Community Health’. White tea is harvested from the young buds of the tea plant and only briefly processed, and it is probably the purest tea that retains most amount of the flavonoids. In a paper published August 4, 2009 in journal ‘BMC Complementary and Alternative Medicine’, researchers from School of Life Sciences at Kingston University in South West London pointed out that white tea had anti-ageing potential and high levels of antioxidants which could prevent cancer and heart disease.
There are no known downsides to drinking a cup or
2 of tea a day. But do take note that excessive amounts of some teas may harm
the kidneys or interfere with medications such as blood thinner. Date: December 12, 2019
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