Green tea has a high concentration of antioxidants called polyphenols, which are good for getting rid of free radicals in the body. It is believed that free radicals are perpetrators of health issues like cancer and heart disease. Oolong tea has high levels of theaflavins and thearubigins which have anti-allergy, anti-inflammatory and anti-cancer agents, according to the Learn About Tea website.
Both green tea and oolong tea are cultivated from the leaves of the Camellia sinensis plant out of Asia, Africa and the Middle East. Green tea is made from unfermented leaves while oolong tea is made from partially fermented leaves. According to the University of Maryland Medical Center, “the more leaves are fermented, the lower the polyphenol content and the higher the caffeine content.”
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According to studies published in the Journal of Nutrition, the European Journal of Clinical Nutrition and the Archives of Internal Medicine, green tea helps to prevent coronary artery disease, lower blood pressure, and triglycerides. It may also help reduce inflammation present in inflammatory bowel disease and promote digestion. Oolong tea, according to the Wu Long Tea website, is helpful in preventing heart disease, cancer and diabetes. The Learn About Tea website reports that in a Japanese study, oolong tea aided in eczema. It has also been suggested that oolong tea is an anti-aging drink that aids in digestion, lowering blood pressure, improving the immune system, fighting bacterial infections and allergies.
Whether you drink green or oolong tea depends on taste preference. The World’s Healthiest Foods website states that green tea is made by steaming the leaves, rolling and then spreading the leaves to be dried with hot air. This leaves an astringent flavor closely matching the taste of the fresh leaf. Oolong tea is made by partially fermenting the leaves before drying them in hot air. The flavor and aroma are richer and smokier than the green tea.
According to the University of Maryland Medical Center website, traditional Chinese and Indian medicines have used green tea as a stimulant, diuretic, and astringent, to help regulate body temperature, blood sugar, and improve mental well-being. Green tea may also be effective against tooth decay, for treating genital warts, boosting metabolism and burning fat. Oolong tea may help fight cavities as well as obesity.
Green tea contains less caffeine than oolong tea but also comes in decaffeinated. Aside from tea, green tea is found in dietary supplements in capsule or liquid form. Not everyone should drink green or oolong tea as they could interact negatively with other supplements or prescription drugs. While some studies have shown green tea and oolong tea to be helpful in preventing disease, the Mayo Clinic and the University of Maryland Medical Center websites warn that other studies have shown conflicting evidence. Therefore, results are inconclusive and more research needs to be done.
References:
“Green Tea,” University of Maryland Medical Center
“Green Tea,” The World’s Healthiest Foods
“Wulong Tea,” Wu Long Tea
“Green Tea vs. Oolong Tea Benefits,” Learn About Tea
“Green Tea (Camellia Sinensis),” Mayo Clinic
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