Natural Factors - Suntheanine, 60 chewable tablets Suntheanine contains pure L-theanine, a unique amino acid found in green tea that is emerging as the premier natural product that supports mental calmness and relaxation. Suntheanine is produced via a proprietary enzymatic process guaranteeing essentially pure L-theanine for maximum effectiveness in a tasty fruit-flavored chewable tablet. Product of Canada. Contains no artificial color or sweeteners; no soy, wheat or yeast. Lowest Price - Too Low to Display Click to See!