If it doesn t have calories, then it s not food. I ve never heard of negative food before, but it can t exist. Besides, if it doesn t have calories, then what s the point of eating it?
you are 12 years old? wow. i don t know what your weight cms is converted to lbs but i think you should talk to your doctor you are too young to start on crash diets, no one should crash diet but 12...wow.