Injectable HGH must be prescribed by a licensed physician. Before beginning treatment, your blood levels of somatomedin-C (also called IGF-1) will be measured. Benefits occur slowly over several months, and full benefits take six months to one year. The lower your initial somatomedin-C levels, the faster you will notice improvements.
HGH is more effective when used together with DHEA replacement therapy. Estrogen/progesterone replacement (for women) or testosterone replacement (for men) may also add to the benefits from hormone replacement therapy. These hormones all decline with age. The goal of hormone replacement therapy is to restore levels to those normally present during early adulthood. Safe levels produced by the pituitary gland at age 30 will remain safe when replaced to that same level later in life.
Recent studies show that the dose of HGH to produce optimum benefit is between 1 and 2 units every day, depending on body size. One to 1½ units daily seems to be the most effective dose, although significant benefits do occur with as little as 4 units weekly. Side effects were mild and transient at those doses, and diminished with continued therapy.
The usual dose is one unit of HGH taken daily for four successive days. The timing of the injections (time of day) may not be important; however, HGH is normally produced by the pituitary gland during the early hours of sleep and, therefore, evening dosing may be preferable. This is followed by a three-day rest (no injections). Based on several years of experience, this dosing schedule has been found safe and most cost-effective. If cost was not so high, twice that dose could safely be taken with added benefit. Some patients prefer to take one unit of HGH every day. That is safe and increases the benefit, but it also increases the cost.
Studies in which significant side effects were reported used more than 2 units daily, and sometimes as much as 15 units daily, which is a serious overdose.
Further readings -
http://en.wikipedia.org/wiki/Dehydroepiandrosterone
