RE: GN Complex Carbs
GN Complex Carbs is maltodextrin
you need to add some protein to your weight gainer shakes, try 1-2 scoops
also post workout leave the gn complex carbs and course your engergy from healthy options like bananas, other fruits, sports drinks, complex carbs like oats and wholegrains
maltodextrin may be a complex carb but it has the highest GI than any other food which means it increases your insulin levels, breaks down to glucose really quickly and if not used up then there is more carbs to be stored as fat!