Today I came across matcha for the first time. It’s made from the whole plant, not just from the leaves.
It has the lowest caffeine level of any green tea. It’s the L-theanine (amino acid) in matcha that makes people alert. The body can’t absorb it as quickly as caffeine, so that pick-me-up lasts for about eight hours. At the same time L-theanine acts on the brain to relax and focus people. One cup of matcha contains 70 times the antioxidants of a cup of orange juice and nine times the beta carotene of a serving of spinach (From http://astronutrition.com/organic-matcha-green-tea-powder-50-grams.html).