The anterior pituitary is the masculine, productive side of the pituitary. The anterior pituitary produces hormones that regulate the entire endocrine system. Human growth hormone is one of the main hormones coming from here to regulate all areas of growth in the body, including hair, skin, nails, muscles mass, and the size of our body as we grow from fetus to adult. The depletion of this hormone in old age tilts the balance in the opposite direction. Other hormones regulate the thyroid (TSH), growth and health of the hair on the body (FSH), stress (ACTH), fat reserves (lipotropin), hair/eyes/skin pigmentation (melanocyte), the reproductive organs and the libido (luteinzing regulates testosterone, estrogen, progesterone, ovulation) as well as bone density, memory, loco-motor activity and slow wave sleep (all of which are repartly regulated by osteocalcin and cortistatin)).