DAO Support is a novel formula designed to support typical function of the DAO enzyme, and histamine metabolism. Comprised of key ingredients such as: Porcine Kidney Powder - Has been identified as a natural source of DAO during multiple analysis Copper - An essential mineral and critical cofactor for the DAO enzyme Pine Bark Extract - Has been found to decrease levels of C-reactive protein and display anti-inflammatory potential. Black Cumin Powder - Used for centuries as a traditional herb and spice, often touted for its anti-inflammatory potential EGCG (Green Tea Extract) - Has been reported to inhibit histamine, and has been extensively evaluated for many other health benefits including anti-inflammatory and antioxidant properties.