The fact that they were extremely affordable, the abundant material for their production, and the ample evidence of their safety are only some of the reasons that led to glandular supplements becoming widely used and effective means of health promotion in the 1930s. These truths still apply today, and due to the high demand of clients Swanson developed a full range of glandular supplements, including our new Raw Pituitary Glandular. All of our glandular products are made from frozen raw material which keeps their components active. Afterwards they pass through the processes of drying, powdering and defatting, and then testing at GMP laboratories in the midland of America.