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About Human Growth Hormones Amino Acids are the building blocks of proteins and proteins are used to make up hormones. Human Growth Hormone (HGH) is one of the largest and most fragile molecules in the body with a molecular weight of about 20,000. It has 191 Amino Acids fashioned in a very specific fashion, intricately folded upon itself. Any change in its fold or amino acid sequence could make this hormone useless. Human Growth Hormone is produced by the anterior pituitary in the brain. Like other endocrine hormones (estrogen, progesterone, melatonin, testosterone, and DHEA) it declines in production with age. Daily growth hormone secretion diminishes with age. A 60-year-old person may secrete 25% of the HGH secreted by a 20-year-old. Growth hormone is primarily released in pulses that take place during the beginning phase of sleep, and then is quickly converted in the liver to its powerful growth promoting metabolite, Insulin-Like Growth Factor Type 1 (IGF-1) also known as Somatomedin C. IGF-1 elicits most of the effects associated with human growth hormone and is measured in the blood to determine the level of growth hormone secretion. Human Growth Hormone or HGH was first discovered in the 1920's. In 1958, Marice Raben at the New England Medical Center in Boston was the first physician to inject HGH into a child who had none in order to stimulate the growth of their short stature. This caused the child to grow normally. The source for this HGH was the pituitary from the cadavers (dead people). Although this was a successful treatment for the growth of children who would otherwise be dwarfs from anterior pituitary failure and its lack of HGH, the FDA ordered the HGH distribution to be stopped in the 1980's due to its contamination with a virus causing Mad Cow Disease (Crestzfeldt-Jakob Disease). Genentech was the first company to biosynthetically clone HGH in 1985. However it was not a perfect replication, it was off by one Amino Acid. In 1986, Eli Lilly was the first company to biosynthesize HGH perfectly. Research done in Denmark and Sweden showed that replacing HGH through injections in deficient adults improved lean body mass. Dr. Daniel Rudman, an endocrinologist, speculated that HGH hormonal replacement may be able to retard or even reverse aging based upon this fact and that Human Growth Hormone decline was very significant after age 35. This decline is also accompanied by changes in lean body mass as well as other symptoms associated with aging. |
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