Canine Matrix Organic Mushroom Supplement for Dogs Mushrooms to the Rescue! A solution for pets in various states of trauma, recovery or rehabilitation and great for senior animals* Provides Super Antioxidant L-Ergothioneine for healthy inflammatory response Contains bioavailable vitamins and amino acids to aid healing tissues Certified 100% Organic, Non-GMO, Full Spectrum, Veterinarian Recommended, Grown in California, USA