Research on tea has shown that the antioxidant activity of flavonoids in green and black tea reduces the risk of many degenerative diseases and helps maintain good oral health. Experts recommend that at least 3 cups of tea per day is beneficial for its curative effect.
Green and Black tea has been shown to have the ability to inhibit lipid oxidation and plaque formation (which can lead to heart disease). It also improves endothelial function (vasoconstriction and vasodilation – the control of blood pressure, atherosclerosis, formation of new blood vessels -angiogenesis). Furthermore, regular consumption of tea helps in reducing blood clotting and cholesterol in blood. Moreover, tea extracts and tea polyphenols are known to inhibit the platelet aggregation to a certain degree, thereby reducing the risk of thrombosis.
Numerous in vitro and in vivo studies have revealed that regular consumption of tea – especially fresh tea – decreases the growth rate of tumours whilst preventing the formation of large tumours. The polyphenols in green and black tea directly react and neutralize chemical carcinogens thereby reducing the risk of cancer. It also increases the activity of detoxifying enzymes which are naturally found in the human body.
Research suggests that tea consumption can be highly beneficial for diabetics. The flavonol, myricetin, which is present in green and black tea, is found to be able to mimic insulin activity thereby help in managing Type 2 or non-insulin dependent diabetes. Moreover, polyphenols in tea inhibit alpha-amylase activity and could contribute to reducing blood glucose.
Consumption of tea helps to reduce oxidative stress. It has been learnt that tea polyphenols inhibit the action of Free Radicals and can contribute to better quality of life for the elderly and also possibly improve longevity of life.
Tea drinking makes a significant contribution in reducing tooth decay as Tea contains fluoride. It has also been found that in addition to fluoride, the polyphenols in tea also act to reduce tooth decay. Recent studies have revealed that tea inhibits the growth of other harmful microorganisms in the mouth.
In addition, some other benefits of tea, as identified by the scientists are said to be responsible for promoting a feeling of relaxation, whilst maintaining mental alertness. L-theanine is said to be responsible and 50mg of L-theanine (contained in two to three cups of tea) can naturally stimulate the brain and bring on a refreshed and relaxed feeling.