In children, HGH deficiency causes short stature and a delay in the onset of puberty. However, in adults, HGH depletion may have as disastrous impact on the body, as it leads to increases in stored body fat, poor muscle mass and even physical depletion of muscles, suboptimal energy levels and exercise capacity, decreased cardiac function and an overall decline in one’s drive and motivation. The psychological changes alone associated with HGH deficiency have been studied to great measure. When HGH levels deplete, adults experience a reduction in their quality of life, energy levels,, sexual drive, and motivation.