Ok I will clear up my first statement. I did notice better sleep within a week of taking it hence the comparison to pharma but the results did not increase the longer I stayed on. With pharma the results just got better with time without increasing the dose. felt like I had hit my early 20s again. eg bodyfat levels improved and just felt good. with medtropin sleep was improved as compared to pharma and my worn out low back improved but bodyfat levels did not improve that is why I said if using it again I would just go straight to 5iu I just feel for general health and longevity you will reach these targets with a good 2iu dose of pharma without ever having to increase dose. so in the long run cost wise I think it would be less expense