Welcome to icliniq.com. L-Theanine is the naturally derived amino acids, which is involved in glutamate transmission and thus helpful in reducing anxiety. There are a few studies which show that L-Theanine reduces the glutamate transmission. So, there is conflicting evidence. But, clinical studies showed the evidence of usefulness in reducing anxiety, hence nothing wrong with consuming it. I suggest you one capsule (200 mg) in the morning and one in the evening. Consult your doctor, discuss with him or her and get the dose altered. These nutritional supplements never act like drugs. So, do not have much hope as Xanax (Alprazolam). You can also consume more tea regularly as the same amino acid is present in it. Ideally, the naturopathy means, supplying the essential chemicals through diet. If somebody never takes tea, then this capsule is advisable. Since there is no side effects with supplement, I advise to try for it. Yoga, pranayama and yoga nidra are the best way to relieve anxiety. Lemon balm is also a good supplement, natural antioxidant and has benefit with old age. But, the role in anxiety is less.