Comment: I did the master cleanse diet for 14 days which is similar to

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I did the master cleanse diet for 14 days which is similar to

what Grange is doing. At the time, I was working a physical job(60 hours), and hitting the gym(weights - NOT cardio). At the beginning I experienced a little light headedness & not to mention a little grumpiness. Needless to say, we're all different, and 14 days isn't even half of 40. I would just advise you to try it out for a MINIMUM of 7 to 10 days. The reason being is that a change like that is a shock to your body as well as mind. It actually got easier for me after day 5 or 6. Depending on how you feel after that, continue it or stop. Just understand that just like you have the preconceived notion that you may pass out - you may mentally defeat yourself before you begin. Rest assured - fasting is perfectly healthy, but you have to give your body a few days to adjust.