Silica is an essential trace mineral that plays a biological role in the processes by which bone, cartilage, connective tissue and skin are formed and is a component of collagen. Using the finest quality European Horsetail Extract with bioflavonoids, Alta Health Silica provides the pure organic form of soluble/collodial Silica by means of the special extraction process patented by Prof. Louis Kervran. Prof. Kervran and Dr. Barmakian worked together on this process during the late 1960's. Only ATLA and one European company can use Prof. Kervran's process.