• Caffeine-free and gluten-free Onnit Alpha Brain helps boost alpha waves in the brain. In doing so, it allows the brain to produce more neurotransmitters, which allows your brain to operate faster. Since there's no caffeine, it's not a jittery, anxious kind of fast-running, but a calm and sure variety. L-theanine allows the supplement to boost and protect memory while enhancing mental clarity and improving verbal memory, even if you're under extreme stress. Alpha Brain helps adults reach the optimal level of concentration, with some reporting performance beyond wh...