By the time you pass 60 years old, your natural generation of growth hormone is almost definitely to be half of what it was when you were twenty years old.
This drop in the amounts of human growth hormone is what can induce us to look older and give rise to age-related health difficulties for instance diabetes. Other effects encompass depression, loss of vigor, and loss of muscle volume.
But we need to keep in mind that the gradual decline in growth hormone isn't the only reason for the manifestations of aging.