Glandular Complex The thyroid hormones thyroxin (T4) and Tri-iodothyronine (T3), regulate growth and metabolism. Glandular concentrates from healthy glands have been found beneficial for growth, repair and balance of weak or malfunctioning glands because they contain naturally occurring minerals, vitamins, raw enzymes, nucleo-proteins (RNA/DNA sometimes called protomorphogens) and tissue-activating proteins specific to that particular gland. Thyro Complex contains thyroxin-free thyroid concentrate along with raw adrenal, pituitary and spleen concentrates which work synergistically to support the thyroid and normalize its function as part of the delicate endocrine system. Kelp is included as a rich source of organic iodine, which aids in the development and function of the thyroid and is an integral part of thyroxin. Iodine deficiency leads to enlargement of the thyroid gland known as goiter and hypothyroidism.