Starvation mode

It seems to me that fasting for a long period of time puts the body in starvation mode. Am I wrong? I went on the Master-Cleanse for 12 days many months ago and lost a lot of weight and muscle, and since then have put all that weight and some additional weight back on. Also, I lost quite a bit of muscle on the MC, muscle that took me many years to build up. I was into weight lifting and running prior to the MC. I never did get rid of any of the M plague that everyone talks about. I'd love to try the Master-Cleanse again as I'm determined to rid myself of Mucoid plague that I know I still harbor, but I'm terribly afraid of loosing more muscle of which at 53 years of age I just can't afford to do. Any thoughts or comments???

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