Health Benefits of Tea
Health Benefits of Tea: Green, Black, and White Tea
All pure teas are derived from the Camellia sinensis plant, a shrub native to China and India, and contain unique antioxidants called flavonoids. The most potent of these, known as ECGC, may help against free radicals that can contribute to cancer, heart disease, and clogged arteries.
All these teas also have caffeine and theanine, which affect the brain and seem to heighten mental alertness.
The more processed the tea leaves, usually the less polyphenol content. Polyphenols include flavonoids. Oolong and black teas are oxidized or fermented, so they have lower concentrations of polyphenols than green tea; but their antioxidizing power is still high.
Here's what some studies have found about the potential health benefits of tea:
Green tea: Made with steamed tea leaves, it has a high concentration of polyphenols and has been widely studied. Green tea’s antioxidants may interfere with the growth of bladder, breast, lung, stomach, pancreatic, and colorectal cancers; prevent clogging of the arteries, burn fat, counteract oxidative stress on the brain, reduce risk of neurological disorders like Alzheimer’s and Parkinson’s diseases, reduce risk of stroke, and improve cholesterol levels.
Black tea: Made with fermented tea leaves, black tea has the highest caffeine content. Studies have shown that black tea may protect lungs from damage caused by exposure to cigarette smoke. It also may reduce the risk of stroke.
White tea: Uncured and unfermented. One study showed that white tea has the most potent anticancer properties compared to more processed teas.
Oolong tea: In an animal study, those given antioxidants from oolong tea were found to have lower bad cholesterol levels. Oolong can help with weight loss.