Since diet is a major part of this game you would be far ahead by learning to prepare your own meals. It doesn't have to be complicated. Cook a bunch of broccoli and grill a batch of steaks on Sunday for the week. Keep milk, eggs and cheese in your ice box for fast meals. Nuts, peanut butter and protein bars in your cupboard. Many powders have fillers and are of poor quality. Not to mention the insulin spike they create which doesn't help your blood sugar levels.