Also known as: HGH, Human Growth Hormone, Somatotropic Hormone, Somatotropin, STH.

HGH is one of several endocrine hormones such as progesterone, testosterone, estrogen, melatonin and DHEA that decline in production as we age. As the name suggests, human Growth Hormone is an endocrine hormone that makes humans grow. HGH is a complex protein molecule of 191 amino acids that are linked in a specific sequence and is secreted in pulses by the pituitary gland. These pulses vary between 10 and 30 per day and the pulses can be strengthened by exercise. Doctors have often prescribed HGH for children who needed a growth boost however growth deficiencies do not just affect children, they can be a significant problem for adults as well. HGH is critical for tissue repair, muscle growth, healing, bone strength, brain function, physical and mental health, energy, and metabolism. The rate that HGH is produced at peaks during adolescence, at time when normal growth is accelerated and production of HGH will decrease with age, 14% each year on average. While GH is not as active in adults, it aids in regulating bone density, muscle mass, and lipid metabolism. Deficiencies can lead to decreased less muscle mass, bone densities, and altered lipid levels.