Question about anorexia?

Not eating does slow down your metabolism. But if you are still taking in less calories than your basal metabolism no matter how low it is, you will still lose weight. Most anorexic people do not eat at all (at least for very long periods of time) of eat so little that they will not reach this lowered basal metabolic rate. Your body will try to save all the fat it can keep and will break down other tissues for energy and do all sorts of other things to try to keep you alive. Although anorexic people have very little body fat, the ratio of the fat to muscle/bone is probably higher than some-one at a normal weight.