text: whats wrong with me? i get light headed and dizzy usually when i get to few calories. im a big guy, 6'2, 220 lbs, and always try to diet, so i dont get any bigger. anybody have experience with this. i suspect its from low blood sugar. what kind of food would be good to avoid this. you need to talk to your doctor.  chronic low blood sugar can be dangerous.  at the very least, talk to a nutritionist about an appropriate menu plan.  (stop dieting!)  if you were my client, i'd take a look at your medical history, talk to your doctor (assuming you gave me the ok) and teach you about the best foods to eat.  your doctor can recommend someone in your area or maybe even a good book to read that will help you understand what your body needs.