L-Theanine Double Strength 200 mg by NOW Foods is an excellent dietary supplement in capsules containing 200 mg of L-theanine and 100 mg of inositol. It is called Double Strength because it contains up to twice the amount of the amino acid L-theanine compared to NOW Foods' classic supplement, which contains 100 mg per capsule.

L-theanine is a unique amino acid found naturally in high concentration in the green tea plant (Camellia sinensis). It serves as a natural relaxing agent that reduces stress, anxiety, and irritability without causing drowsiness or negative effects associated with other sedative agents.

It improves perception and cognitive ability while promoting healthy vascular function. L-theanine has a positive effect on the brain, similar to that brought about by meditation, massage, and aromatherapy.