I find that when I have an energy bar (instead of a meal) that a couple of hours later I feel shaky, nauseous, and clammy. I'm figuring it's relative hypoglycemia, but it's put me off from eating them. I used to just eat beef jerkey during a shift (no carbs to crash from), but I'm a little worried about gastric cancer if I keep that up for 20+ years. Does anyone know of any other ready-made product that can be quickly consumed, doesn't require refrigeration, and leads to a sustained feeling of fullness (and I guess stable blood sugar)? I don't really care about price, but if it requires more than minimal prep time it's a no-go.