For me it has always been when I can no longer take the cleanse mentally. I am not sure I have reached my physical limit (even on my 18 day fast).
Listening to your body is the best guide. If you are run down, try drinking a bit more of the lemonade today & tomorrow and see if your energy level picks up. If so, keep going knowing that you need to drink a bit more and if things are still run down in a couple of days, that is probably a good sign that the body is ready to get back to eating.
_________________ Whether you think you can, or think you can't, you're usually right.
Henry Ford
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