ive got a question that maybe one of you can answer me.can dieting play havic on your immune sytem.ive lost 45 lbs by watching my calore intake.but now all of a sudden i keep getting colds. i have one now and i just got over a cold about a month ago.ive never had two colds , one right after another.other then the colds i feel great. i have more energy then ever before.i know i get enough vitamin c because i eat a lot of fruit in my diet.please help, thank you