autophagy
What is Autophagy?
Put simply, Autophagy is a detoxification process whereby your body "cleans out" old and damaged cells and regenerates new ones. You do this process automatically all the time. Your body is in a constant regenerative state as old cells are discarded and new ones produced.
However, the rate of cell destruction can sometimes exceeds the rate of cell reproduction. This is where damage is done to the cellular structure and disease can "set in" long term. A short term example of this would be excess alcohol intake. Remember your last hangover? That resulted as your system was unable to process the material you put into your body faster than it could eliminate it. You suffered for an hour or two and then you "came right." With no more headache and no more queasy stomach, you system has processed all the "toxins" out.
That's a very simplistic explanation, but I hope you get the idea. For a deeper explanation, read on: