Not a month, but 10 days. It was great – felt amazing. A bit weak, & craving food I see others eat, but other than that feeling “floating in the air”. Drank only juice. Besides being fun, I didn’t notice any long term effect (apart from weight lose). I intended to do it for 2 weeks, but my father (a physician) told me that the 1st muscle the body turns to for proteins, is the heart, so I’d better stop. So, I won’t recommend more than 2 weeks, without medical supervision.