The Science of Calm and Sharp: What Recent Research Reveals About Green Tea, L-Theanine, and Cognitive Performance
By Zhané Slambee Published: September 9, 2026 Main Facts We have all experienced that distinct, frustrating threshold of the afternoon slump. You are tired enough to crave the energetic jolt of another cup of coffee, yet wired enough to suspect that an extra dose of pure caffeine might send your heart racing and your anxiety…
