Large servings of caffeine in just...
L-Theanine by Stark Pharm is a dietary supplement derived from tea leaves and is a natural relaxant.
Now Foods - L-Theanine contains the natural relaxant theanine, an amino acid extracted from green tea leaves.
The combination of amino acids theanine + tyrosine contributes to the strengthening of the nervous system, immunity and regulation of hormones responsible for good health.
Supplement to improve the quality of sleep, increase academic performance, increase mental alertness and concentration.