A SOURCE OF L-THEANINE IN CAPSULES100 SERVINGS PER PACKAGEAS MUCH AS 200 MG OF L-THEANINEFOR PEOPLE LEADING BUSY LIFESTYLESALLNUTRITION L-THEANINE is a source of l-theanine in capsules. The product is especially recommended for people who lead busy lifestyles, are exposed to stress or want to improve their ability to learn effectively. A FEW WORDS ABOUT L-THEANINE…It is a biologically active non-protein amino acid found naturally in tea leaves and making up approximately 1–2.5% of their dry weight. Because the chemical structure of L-theanine is very similar to that of glutamine, it is able to cross the blood-brain barrier.

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