Matcha is fine powder tea that has the highest amount of antioxidants. It is also high in caffeine but the benefits outnumber the fact that is high in caffeine. It is primarily made from Tencha Green Tea. The tencha leaves are shade grown and then plucked, deveined and ground. The grinding is a long process as it has to reach the minuscule size of 5 to 10 microns ( there are 1000 microns in one millimeter).