Green Tea Leaf Extract

Green tea helps you focus for two reasons: one, it contains caffeine, and two, it contains L-Theanine. There is no doubt that caffeine helps you focus and improves your alertness. Good. That’s covered. The two ingredients also combine to “produce a better ability to focus attention, with improvement of both speed and accuracy." If you’re able to handle the caffeine content, introducing green tea into your diet is pretty much a no-brainer.