About.com:Longevity
The human growth hormone (HGH) is a hormone that is made by your body in the pituitary gland.  It is often marketed as an anti-aging hormone.  In children, it is important for normal growth.  In adults, HGH helps regulate and maintain your tissues and organs.  Children sometime receive HGH injections because a lack of HGH in their body is impacting their growth rate.

HGH and Aging

Like many hormones, HGH levels decrease as a person gets older.  This is a normal part of aging.  HGH is becoming a popular anti-aging supplement.  Because HGH is only available in injection form (other forms of HGH have not been proven effective) HGH must be given by a doctor.  The cost for one year of HGH injections can be more than $15,000.  The saddest part is that there has been little research on HGH and aging –- one study shows that lower HGH levels correlate to increased longevity compared to people with high HGH levels.  Read More

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