Premier Labs’ Enhanced Thyroid Complex contains concentrates (not extracts) and are derived from New Zealand range-grazed animals. The grasslands are non-fertilized and the animals are not administered feed supplements, hormones or antibiotics. The glands are quick frozen, never exceeding -5°C. Their cellular structure is not damaged and preserved in a biologically active and live state. Source materials are not subjected to organic or aqueous solvents and therefore, no chlorohydrocarbon remain as residue in the tissues. These exclusive methods used to produce our products provide the purest nutritional factors needed for the growth, repair and support of the gland entering the small intestine. This method, in fact, produces a more active product. The efficancy of this already unique and active product is heightened further by the Ph shielding of its sensitive ingredients. This shielding prevents destruction of enzymes, polypeptides, and other protein substances by the action of HCI and pepsin in the stomach.