L-Theanine Vitamin B1 Colostrum Calming Complex Manufactured in The U.S.A* For Cats of All Sizes Works Naturally, Not A Sedative Helps Manage Everyday Stress and Behavioral Issues No Wheat No Corn No Artificial Ingredients Veterinarian Formulated For All Cats NASC - Quality Seal Delicious. Different. Your cat deserves the best pet supplement the world has to offer. That's what's in the package. Every Pet Naturals supplement is naturally formulated with the most pure and potent ingredients available. Why It Works L-Theanine - Patented form of a naturally occurring amino acid that supports normal chemical balance in the brain, thereby promoting a calming effect - without causing drowsiness. Vitamin B1 - Has been shown to affect the central nervous system beneficially by helping to calm and relax anxious animals. Colostrum Calming Complex - Derived from proteins that have been found to support cognitive function and manage everyday stress. *Manufactured in the USA with imported and domestic ingredients.