One of the most common questions asked about HGH is whether it can make users grow taller. Between the ages of about 12 and 18, your body is still growing. During this time, the administration of HGH can help you add inches to your height. As such, HGH is an essential part of therapy for children who have growth disorders such as dwarfism. However, between 18 and 21 years old, growth plates on your bones fuse together and essentially “lock” your height. Administering HGH may cause individual bones in your body to thicken, but it will not lengthen them.
GHRP-6 can be effectively used in the elderly, very effective anti-aging therapy. GHRP is often used in conjunction with CJC-1295 (GRF 1-29) for pulse amplification of growth hormone. GHRP-6 is to be applied on an empty stomach, at least half an hour before meals. For bodybuilders and athletes GHRP-6 helps very effectively to gain muscle mass, increase strength, recovery and burn fat. GHRP-6 improves energy metabolism. After administration of GHRP-6 occurring rapidly increased appetite, often observed in connection with the leaching of ghrelin stimulation (approximately 20 minutes after injection). Ghrelin is a hormone naturally released in the walls of the stomach, which increases hunger. Due to these characteristics, GHRP-6 sometimes also used to treat cachexia (wasting), eating disorders and obesity.
Acromegaly patients, who suffer from natural growth hormone levels of up to 100 times higher than normal, have lower stamina towards physical activity than people with regular levels.  When the patients are treated and their growth hormone levels decrease, their stamina improves.  This knowledge is part of the evidence behind the new belief that athletes who use supplemental HGH to raise their levels far above average could actually decrease their exercise tolerance, and thus hurt their athletic performance.  Further backing was provided in a study done by the Danish Institute of Sports Medicine. They found cyclists of good health and endurance “were unable to complete accustomed cycling tasks after administration of exogenous hGH” and concluded that HGH can inhibit recuperation from exercise.  Participants have also been found to have lower stamina after HGH treatment along with higher rates of fatigue.