CanPrev L-Theanine with Magnesium 90 Veggie CapsEach vegetable capsule contains a 250mg daily dose of L theanine Promotes a restful, relaxed state without diminishing alertness 90 day supply When youre looking for a supplement that helps you relax without making you feel drowsy, then CanPrevs L Theanine with Magnesium just might be the answer. L theanine is an amino acid found in green and black tea and commonly used as a natural stress reliever. In addition, it can help to improve concentration