An Exploratory Study to Detect the Effects of the Combined Intake of Gamma-aminobutyric Acid (GABA) and L-theanine on Sleep by Wearable Device https://consensus.app/papers/exploratory-study-detect-effects-combined-intake-konno/223d8e5d40bd58238cd22a492719a6ec/ Conclusions of this very small study : The simultaneous intake of GABA and L-theanine improved sleep in adults