Matcha (Camellia sinensis) is prepared several weeks before harvest and may last up to 20 days. The growers cover the tea bushes to prevent direct sunlight. This slows down growth and stimulates an increase in chlorophyll levels. It also turns the leaves a darker shade of green, and causes the production of amino acids, in particular L-theanine.
This tea is an exceptional gift from Mother Nature. L-theanine is unique, as it can induce alpha wave activity in our brains for stress support and mood.
Moreover, results from the USDA’s ORAC test method show that matcha is on average 10 times greater in antioxidant potency than superfoods like acai, goji berries and others.
1 – Cognitive Function Protection
Animal studies show that green tea’s catechins provide some protection against degenerative diseases. They could also act as anti-tumorigenic agents.
In addition, green tea and its isolated constituents may be effective in preventing oxidative stress and neurological problems. 
Some studies showed that green tea influences psycho-pathological symptoms (e.g. reduction of anxiety), cognition (e.g. benefits in memory and attention) and brain function (e.g. activation of working memory seen in functional MRI). 
Moreover, matcha green tea can improve blood micro-circulation in the brain. It may also promote the production of neurons and important neurotransmitters necessary for proper brain function.
2 – Stress & Anxiety Reduction
One Japanese study found that students who drank green tea experienced consistently lower levels of stress than students in a placebo group. 
Another study reported that the ingestion of matcha reduces stress. In fact, it was demonstrated that regular ingestion of matcha reduced the anxiety-like behaviors induced by psychological and physiological stresses. 
Anxiety, a reaction to stress, was significantly lower in a test-matcha group than in a placebo group during another study.