HGH is produced in the human brain by the pituitary gland. It is produced in greatest amounts in adolescence . As we age, the productionof HGH (Human Growth Hormone) diminishes. By the age 60, HGH levels decreaces by 80% from adolescent levels. Depletion is marke by the familiar signs of aging, such as increased body fat, lack of vitality, decreased muscle mass, and poor health. Non-GMO Formular.