Is HGH growth with GenF20 Plus just for older adults? With age comes the loss of HGH levels in your body. For men and women it's exactly the same problem - the older we get, the less HGH is produced in our bodies. So the older person will quickly appreciate the fast onset of natural HGH regrowth in their bodies by using GenF20 Plus. Depleted HGH levels can arise also for other reasons that include lack of exercise, poor diet and stress! This can happen at any age with varying degrees of effect, but mostly for men and women, after their 20's, is when HGH depletion starts!