HGH reaches its highest in pubertal age at the highest levels of human life when it is growing. Later, after the age of 20-23, HGH begins to fall.
As you know, with age, our hormonal system begins to brake and enter. Testosterone falls for men, estrogen is up (for women), HGH decreases ... we stay slow, steep and get unhappy. HGH has proved to itself that when it is used in old age, people return to life, they more get energy, stress levels and sleepiness fall, improves life quality. A person at retirement age has a feeling again, as before 30.40.50 years. Energetic and young.
It alone proves the role and potential of HGH, without knowing anything about anatomy.