Theanine Serene™ with Relora® contains a variety of ingredients to promote relaxation and reduce feelings of stress. One of these is L-theanine, a substance from tea that has a good track record for calming and relaxing the mind and body. Other ingredients include GABA, taurine, magnesium, holy basil leaf, and Relora — all of which work together to enhance the effects of theanine.