idk about the product you're talking about, but high dose L-arginine (8-12g) has been shown to increase gh if taken before bed, creatine also increase gh..
Let me say this, i dont believe in these natural boosters that increase gh and test will give you advantage in gaining muscle or losing body fat, they do increase it but not to a point where you'll feel like you've injected it synthetically..
My theory is if you want any hormones to build muscle or burn fat, inject the hormone, dont do it naturally it wont make a difference..