HGH is a good way to help restore youthfulness, however, it not makes you look and feel younger it also replaces your already developed muscle tissues. When we reach a certain age our muscles become denser and stronger. Taking HGH will undo all the work already done on our muscles. For eg. You are 40yr old, strong but a little over weight with a few lines on face. You have a little tummy and wants to get rid of it. You take the HGH for 3 months and this is what will happen. You may or may not lose the pouch, you will lose some weight, you will lose a few lines, you will lose muscle density. You muscles now are like a 12 or 13 yr old. Almost no muscle tone.

In short, it's very simply because of the anatomy. If you take an oral tablet, it takes time to have an effect. Though if you inject, the effects are instantaneous.