There are many different types of tea, the most common are black, oolong, green, and white. Different kinds of tea have different kinds of flavonoids. That's important because different flavonoids appear to play different roles in protecting the body from disease. While green tea has the most EGCG, black and oolong teas have more of the complex flavonoids called thearubigins and teaflavins. These are formed during the fermentation process and have been found to offer protection against heart attacks and cardiovascular disease.
Black tea is rich in antioxidants known as polyphenols and catechins, which help prevent DNA damage and different types of cancers Recent medical research suggests that the compounds found in it, namely theaflavins and thearubigins, are positively loaded with health benefits, in addition to giving the tea its dark color and unique flavor. Black tea has 5.25 mg of caffeine per fluid ounce. The unsweetened tea has few or no calories and has minimal sodium, proteins and carbohydrates.
Oolong teas, have the ability to reduce chronic health conditions such as heart diseases, inflammatory disorders, and high cholesterol levels while providing vital antioxidants and promoting superior bone structure, robust skin, and good dental health.
Green tea has been shown to improve blood flow and lower cholesterol and has also been shown to help block the formation of plaques that are linked to Alzheimer's disease. It also, seems to help keep blood sugar stable in people with diabetes.
White tea can reduce the risk of cancer, cardiovascular disorders, and an improve oral health. It has antioxidant and anti-aging properties which help to maintain good health and wrinkle-free skin. It protects the skin from harmful effects of UV rays and because of the antibacterial properties in white tea, it protects the body from various infection-causing bacteria too. It provides relief to diabetics from symptoms such as decreased plasma glucose levels, increased insulin secretion, and excessive thirst (polydipsia).