The Nutritions

Theanine (Teanin)

Tea is the only plant that makes the amino acid Theanine, also known as Teanin or L-Theanine. Theanine stimulates alpha brain waves, which are associated with a relaxed but alert mental state. It helps relax the mind, allowing one to focus on the task at hand. Catechin is bitter and Theanine is sweet. These two elements create a perfect balance of taste.
Controlled experiments have shown that Theanine has a positive effect on the mind and improves memory by increasing Dopamine levels. The experiments also show that alpha brain waves increase 40 minutes after consuming Theanine. People can take advantage of their full mental capabilities when they are relaxed. So try a cup of green tea 40 minutes before work or study!
You might wonder how a cup of green tea, which contains so much caffeine, can be relaxing. The answer is Theanine. Theanine tempers the effects of caffeine, which can cause nervousness or excitability (as you might find with coffee) and works to relax the mind. So, although much caffeine is contained in green tea, green tea does not cause nervousness or excitability becaus of Theanine.
Much Theanine is found in tea leaves of Ichibancha (the first pick of the year) and Karigane (made from the stems of high grade tea). Gyokuro and Matcha are especially rich in Theanine because the tea leaves are grown in the shade before harvest. Theanine is equally extracted both in low and high temperatures.

WHAT ARE TANNINS AND HOW DO THEY AFFECT HUMANS?

Tannins are plant-derived organic compounds found in tea leaves.

Tannins have been shown to contain antimicrobial, antiviral and antifungal properties. As a potent antioxidant, tannins provide protection from the oxidization of cells caused by free radicals. This benefit, in addition to tannins ability to reduce inflammation and prevent gene mutation may protect against the development of certain cancers.

Tannins may also be useful as a dietary aid for weight-loss due to their interference with the conversion of certain nutrients and food substances during the digestive process.

Vitamin C

Vitamin C, Catechin, and Vitamin E work together to enhance immune function. These three nutrients also help to make your skin more beautiful by reducing blemishes, wrinkles and sun damage. Vitamin C found in green tea is water-soluble, and the heat used in brewing tea does not reduce its potency.

Caffeine

The mild caffeine in green tea has been found to increase cognitive performance, alertness, and energy. It can also help with weight loss through its stimulating and mild diuretic effects. The green teas with the highest caffeine content are Matcha, Gyokuro and Sencha. Houjicha (Bancha) and Genmaicha have the lowest caffeine content.

Bioflavonoids

The bioflavonoids found in green tea help to keep your teeth and gums healthy. You can gargle with green tea after brushing your teeth to kill germs and prevent bad breath.

Minerals

Tea is rich in minerals, including manganese, potassium and calcium, which help to alkalinize the blood, regulate the heartbeat, and build strong teeth and bones.

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