Synthetic growth hormone has been widely used for more than 10 years, so we have many studies to help evaluate its effectiveness. After researches and combined studies scientists reach to the conclusion that Growth hormone can decrease fat mass by an average of 2 pounds, fat by 1 percent, visceral fat by 9 inches, low density lipoprotein (bad cholesterol) by 9 mg/dl and total cholesterol by 7 mg/dl.
Lean body mass can increase up to 4 pounds. Five to 7 percent of people experienced side effects such as joint pain, swelling and numbness to the hands and feet. There were small increases in blood sugar and insulin, but these effects were short-term and temporary. Growth hormone decreases abdominal fat and increases muscle mass, without causing changes in body-weight.
The scientists also cautioned that we need long-term studies to assess the effectiveness of growth hormone supplements and their effects on the heart and longevity.