Unbeknownst to many, green tea actually comes from the same plant from where normal tea is obtained. Scientifically, it is known as Camellia sinensis. In fact, it is the same tea but it is processed differently. The normal black tea is obtained by fermenting the tea leaves. This fermentation changes its color and flavor while raising the level of caffeine and tannin in it. On the other hand, in the case of green tea, the tea leaves are dried or slightly steamed but not fermented. This is what makes it look green when it’s brewed.
Researchers from the Netherlands confirmed in a recent study that two green tea compounds, L-theanine and caffeine, can significantly boost levels of attention and alertness, building on what is already known about the brain benefits of green tea. The drink is less likely to make you jittery and anxious than other energy-boosting drinks, because it contains lower levels of caffeine than other teas or coffee. In another study published in the American Journal of Clinical Nutrition, researchers discovered that drinking just one cup of green tea a day made people age 55 and older 38 percent less likely to experience a decline in their mental abilities. Drinking a second cup daily made them 54 percent less likely to show mental declines.
Rooibos or 'red bush' from South Africa is found to be a very potent variety of red tea prepared from the leaves of the herb Aspalathus linearis. Indigenous to the Cape of Good Hope region of South Africa, Rooibos is the only red tea that undergoes a fermentation process similar to black tea. Fermentation turns the green leaves into a garnet colour and lends a very sweet flavor. Rooibos endowed with a very high magnesium ('Nature's tranquilizer') component, acts as a natural adaptogen i.e., that which helps the body adapt to stress.
The preparation of matcha is the focus of Japanese tea ceremonies, and it has long been associated with Zen. This is likely one reason it’s becoming so popular, as meditation is becoming more and more mainstream. Because I’m blown away by the research on the health and weight loss benefits of mindfulness meditation, I included an entire chapter about this practice in my new book Slim Down Now, and recorded a five-minute guided meditation video on my website (click on the word mindful, top right to view).
Research shows that people who regularly drink green tea do not fall victim to common bacterial and viral infections as easily as those who do not add it to their diet. It boosts the immune system. The catechins, present in green tea, prevent bacteria and viruses from attaching themselves to cell walls in order to infect them. These catechins also counter the toxins released by microbes. This antimicrobial property also protects you from bad breath, dysentery, diarrhea, tooth decay, indigestion, flu, cough and cold, and colitis, all of which are caused by the microbial and fungal action.
Loose leaf green tea has been the most popular form of tea in China since at least the Southern Song dynasty. While Chinese green tea was originally steamed, as it still is in Japan, after the early Ming dynasty it has typically been processed by being pan-fired in a dry wok. Other processes employed in China today include oven-firing, basket-firing, tumble-drying and sun-drying. Green tea is the most widely produced form of tea in China, with 1.42 million tons grown in 2014.
2. Enables digestion: Red tea is caffeine-free and also free of tannins. This element is present in other teas and is known to cause digestive issues among many people. Red tea is a storehouse of antispasmodic elements, preventing diarrhea and gastric issues. It has no oxalic acid, this makes it suitable for those who are prone to developing kidney stones.
The Alzheimer's Society commented that "this study adds to previous research that suggests green tea might help to reduce the risk of Alzheimer's disease. However, the researchers used a far higher dose of the active green tea chemical than would ever be found in the human body. More research is needed to see whether green tea is protective at a much lower dose, and to understand the mechanism involved."
Green tea contains significant amounts of flavonoids, antioxidants that protect against heart disease by slowing the breakdown of LDL cholesterol, preventing blood clots, and improving blood vessel function. The benefits of green tea also include associations with lower cholesterol and lower rates of artery blockages. People who drink a cup or two a day have a 46 percent lower risk of developing narrowed arteries. Upping that to three cups a day lowers the risk of having a heart attack by 43 percent and of dying from a heart attack by 70 percent. It can even help prevent a second heart attack. In a study of 1,900 patients recovering from heart attacks at Beth Israel Deaconess Medical Center in Boston, the death rate among patients who drank at least two cups of tea a day was 44 percent lower than among non-tea drinkers.
In 1994, Burke International registered the name "Rooibos" with the US Patent and Trademark Office, thus establishing a monopoly on the name in the United States at a time when it was virtually unknown there. When the plant later entered more widespread use, Burke demanded that companies either pay fees for use of the name, or cease its use. In 2005, the American Herbal Products Association and a number of import companies succeeded in defeating the trademark through petitions and lawsuits; after losing one of the cases, Burke surrendered the name to the public domain.
Jump up ^ Caini, S; Cattaruzza, MS; Bendinelli, B; Tosti, G; Masala, G; Gnagnarella, P; Assedi, M; Stanganelli, I; Palli, D; Gandini, S (February 2017). "Coffee, tea and caffeine intake and the risk of non-melanoma skin cancer: a review of the literature and meta-analysis". European Journal of Nutrition (Systematic Review & Meta-Analysis). 56 (1): 1–12. doi:10.1007/s00394-016-1253-6. PMID 27388462.
Green tea is processed and grown in a variety of ways, depending on the type of green tea desired. As a result of these methods, maximum amounts of polyphenols and volatile organic compounds are retained, affecting aroma and taste. The growing conditions can be broken down into two basic types − those grown in the sun and those grown under the shade. The green tea plants are grown in rows that are pruned to produce shoots in a regular manner, and in general are harvested three times per year. The first flush takes place in late April to early May. The second harvest usually takes place from June through July, and the third picking takes place in late July to early August. Sometimes, there will also be a fourth harvest. It is the first flush in the spring that brings the best-quality leaves, with higher prices to match.
The first early harvest of tea, plucked before the first flush, is called shincha. Shincha is made from the youngest new growth leaves, and is plucked from early April to early May. Shincha typically refers to the early harvest of sencha, but can refer to any type of tea plucked early in the season, before the main harvest. Because of the limited quantities in which it is produced, shincha is highly prized and expensive to obtain.
Most detox teas contain caffeine, probably because this stimulant may suppress appetite, trigger your digestive system to let go of waste, and help you shed water weight. A caffeine-induced energy boost may also lead to working out a little longer or harder than usual. However, too much caffeine can also be risky (see above) and interfere with getting enough sleep–and catching too few zzzs may ultimately undo the tea's weight-loss effects. In fact, too little shuteye has been shown to trigger excessive eating and weight gain and even slow metabolism, which can make it easier to gain weight even if you don't eat extra calories. A good rule of thumb, regardless of where your caffeine is coming from, is to nix it at least six hours before bed. And if you're trying to shed pounds, commit to making adequate sleep a top priority.