I use GH for anti-aging/overall feeling good component.
currently running 4iu a day.
I am 40 and the last 5 months has been some of the most stressful time in my business life and I am handling it better then ever. I sleep better for sure and I require less sleep. My hair is fuller too.

For fatloos or lbm I have not seen much at 2 or 4iu.

But for my useage I think its worth every penny.