Matcha is the pure, shade-grown leaves from the green tea plant (Camellia Sinesis) that is stone-ground into a fine powder. Because you consume the leaf in its entirety (there is no steeping involved), the nutritional value skyrockets.
Japanese matcha is known for having the highest quality, most vibrant green matcha on the planet. This is largely in part to the meticulous farming and harvesting methods that have been part of traditional Japanese culture for centuries. Japanese agricultural standards are cleaner and purer than most countries.
Matcha grown outside of Japan has been shown to not only be of much lesser quality, but also has been found to have a high rate of contamination due to pollutants that affect the soil conditions.
Because you are consuming the entire green tea leaf as opposed to steeping it, you are taking in all the health benefits that come with the plant. When you drink steeped green tea, the majority of the nutritional value is not being consumed. With matcha, however, you received 100% of the antioxidants, amino acids, chlorophyll, fiber, and vitamins contained within the green tea leaves.
Just take a look at several of the following benefits that come with consuming matcha tea:
One serving of matcha is nutritionally equivalent to 10 cups of regularly brewed green tea.
137x more antioxidants than regular steeped green tea (high EGCG content)
Boosts metabolism and burns calories
Detoxifies and cleanses, rich in chlorophyll
Calms the mind and relaxes the body (L-Theanine)
1 serving of matcha contains 1/3 the caffeine as a cup of brewed coffee