This is perhaps the most common hormone in the body, and it is also a precursor (a substance from which other important hormones are produced). Often called "the Mother Hormone," DHEA is secreted by the adrenal glands, but is also produced by the skin and brain. It is an essential component in many of the body's physiological and metabolic functions including: building the immune system by reversing the effects of stress, regulating hormone balance and helping maintain general levels of well-being. It promotes an anabolic or protein building state, which increases lipolysis or breakdown of fat - resulting in decreased cholesterol and body fat. Studies link it to reduced cardiovascular risk and restored sexual vitality.
This is another precursor hormone. It is made in the brain. It functions as a memory enhancer, and is a factor in cellular repair, particularly in the brain and nerve tissue. It protects against neuronal injury and facilitates cerebral function. Melatonin
It is produced by the pineal gland (near the brain). It is a neurotransmitter hormone that regulates circadian rhythms or, your patterns of sleep. Research has shown that the cells of the body rejuvenate and repair during the deeper stages of sleep. Deeper stages of IV sleep help produce natural "CD4" killer cells, which are important to a strong immune function. Deep sleep also helps energise the body and improve mood. Melatonin has powerful antioxidant effects, which also helps disease prevention. Melatonin deficiency is linked to poor sleep, jet lag, irritability, hypersensitivity and premature ageing. Studies also link it to inhibiting breast cancer cell proliferation.

Thyroid Hormone
Produce by the thyroid gland, this metabolic hormone regulates temperature, metabolism and cerebral function. It contributes to energy levels and the body's ability to maintain a constant temperature. It increases fat breakdown, thereby reducing cholesterol levels and the body weight. Thyroid hormone is probably the safest and most beneficial cholesterol reducing agent, yet it is infrequently used for this. It is also vital in the prevention of cognitive impairment.
Growth Hormone (human growth hormone, hGH)
It is produced by the pituitary gland and converted by the liver into a protein called somatomedin-C or IGF-1 (insulin-like growth factor-one). It is IGF-1 that is partially responsible for the growth hormone functions in the body. Growth hormone contributes to ongoing tissue repair, cell rejuvenation, bone strength, brain function, enzyme production, and the integrity of hair, mails and skin. The signs of growth hormone deficiency are significantly correlated to the signs of ageing: body composition shifts from lean muscle mass and high energy levels to increased fat/body weight and low energy levels, decreased bone mineralization (bone growth slows), vitality ebbs, and cardiovascular disease and mortality increase. Concurrent with physiological effects, decreased human growth hormone also has psychosocial effects that include impaired physical performance, poor sleep, and decreased social interaction.
Produced by the adrenal glands, testes and ovaries, it is a hormone vital to both sexes. It contributes to muscle mass, strength and endurance, decreased fat, increased exercise tolerance, enhancement of well-being, and sex drive. In males, testosterone protects against cardiovascular disease, hypertension and arthritis. It leads to improved lean muscle mass, increased bone density, decreases in cholesterol, improved skin tone, improved hearing capacity, and increased libido and sexual performance. It prolongs the quality of life by decreasing age-related diseases, as does oestrogen in females. Testosterone is also extremely important in females, making supplementation an ideal option for both men and women.
Primarily a female hormone, it is secreted by the ovaries, but men's testes and adrenal glands also produce a small quantity. In women, oestrogen protects against heart disease, stroke, osteoporosis, Alzheimer's Disease, memory disorders, vaginal atrophy and urinary incontinence. It also prevents symptoms of menopause, including hot flashes and temperature disregulation. It improves balance by improving the visual somatosensory system within the central nervous system. Oestrogen deficiency also results in sagging breast skin, increased face wrinkles, fatigue, depression, mood swings, and decreased libido. Oestrogen is instrumental in orchestrating the menstrual cycle, and works in harmony with progesterone; both of which are essential to normal healthy female function. Often equine (horse) based "oestrogen" taken from pregnant mares' urine is used to replace human oestrogen. These equine-based products actually contain estrones, not human estradiols or estriols, and equine products have been linked to incidences of cancer.
This is again considered a female hormone. The root components of the word ("pro" means "for" and "gesterone" means "gestation") clearly point out the importance of this hormone. It is produced in four areas of the body; the ovaries, the corpus luteum (the ruptured follicle), the adrenal glands, and in the placenta of pregnant women. Progesterone is often used to treat PMS. It protects against uterine and breast cancers, osteoporosis, fibrocystic disease and ovarian cysts. Often synthetic progestin is used to replace natural progesterone, and is accompanied by significant side effects.