What the fuck, man. I expect this shit from the "25" year olds, but 44?. Did you do ANY research?

1. Have a read here http://labeling.CENSORED.com/ShowLabeling.aspx?id=583 but you can get a new cartridge so there is that.
2. There are lots of sources but based on what I have seen your talking 2 iu a day min every day seems to be the dosage for anti aging. You do not say what your goals are so kind of hard to give more info. Also everything I have seen says do not take it at night as that suppresses your natural production and kind of defeats the purpose. FYI you need to go 3 - 6 months of this kind of usage for good results. The Dr I was seeing said give it 12 months.
3. Younger looking skin, better sleep, more energy, slight increase in metabolism
4. At low does not much that I have see, I know a guy who takes 2 iu a day with some stuff he ordered from China and he feels it makes him younger. We have a good Dr who is OK with the China source as he realizes being a pain just means people will not be honest. Also once your over 60 he is like what harm are you going to do.

Good luck but sounds like you need so to some more research as your not going to see much with 36 iu.