True, if the practical purpose of rhGH is increased skeletal muscle mass (and the dosages to support it) then Insulin makes more sense. However, if the practical purpose is (or if the user is limited by dosage) lipolysis and maintenance of muscle mass, anti-aging, collagen synthesis, cognitive benefits, cardiorespiratory endurance, bone density (with long-term administration), et cetera, then Metformin makes more sense.
BTW, while it may be clear to @IronVtwin, I'd be wary of coming to conclusions, almost always from in situ cancer cell lines, which behave remarkably differently from healthy human physiology.
Same here…..metformin hasn’t affected my sex drive at all….I’ve only gotten postive results from metformin….I look better and feel better on metformin!