QUOTE : As long as we have plenty of food, our bodies are mainly interested in growing, having sex, and reproducing. Nature has no long-term plans for us; she does not invest in our old age. Once we’ve reproduced, we become disposable. So what happens if you decide to fast? Well, the body’s initial reaction is one of shock. Signals go to the brain reminding you that you are hungry, urging you to go out and find something to eat. But you resist. The body now decides that the reason you are not eating as much and as frequently as you usually do must be because you are now in a famine situation. In the past this would have been quite normal. In a famine situation, there is no point in expending energy on growth or sex. Instead, the wisest thing the body can do is to spend its precious store of energy on repair, trying to keep you in reasonable shape until the good times return once more.