Youtheory® Relax Magnesium Powder is a delicious and effective way to supplement your magnesium, while offering a unique blend of powerful anti-stress nutrients. It contains L-theanine, an amino acid found in green tea, which promotes mental calmness without drowsiness*, as well as PharmaGABA®, the only natural source GABA clinically shown to boost the production of alpha brain waves to help create a deep sense of relaxation.*