taking shakes does not make you unnatural.
if you are putting the work in the gym, and eating shit loads of goodies like steaks, eggs, your veggies, all pork products, gallons of milk, and having a sandwich with cold cuts any chance in between, i do not believe there is any reason why you would not be growing. don't throw your money away on that powdered crap unless you are sure you need it. plus, food tastes better.