Malic,
I couldn't find exactly what you were looking at from the link, but, the standard fishoil approach is to say that the stuff has X, Y or Z in it, though it DOESN'T say how much. If it doesn't say, you are guaranteed it isn't much.
And, something like IGF or HGH must be injected. If not, it has no effect. (Though there is some work being done with sections of HGH that can be taken orally and used to lose fat - but it has only been done on RATS so far).
So basically, they are telling the truth. HGH and IGF can help you gain muscle mass. This substance has it in it. They don't tell you that it has so little stuff in it you can barely measure it. Nor do they tell you that IGF and HGH must be injected to have an effect.