Yeah there is a lot of information on this. You can use them as a stack but just remember one thing. HGH exhibits its positive effects by its positive effect on the IGF-1 axis. Meaning it works because it increases the bodies production of IGF-1, which in turn produces more spliced variant MGF. There are a couple benefits to running them together although I think the cost:benefit ratio begins to get a little high unless you have a lot of money. Personally I would either do short bursts of MGF+LR3 IGF-1 or do long cycles of HGH+Slin.