Do P&B's really start digestion? My benefits so far.

Thank you for your advice Tiffany. Yes, I'll only do the Liver Flush once I'm eating well, in about a week.
Is it true that P&B's really start digestion on the MC? I've read differing opinions.
What are the signs of digestion starting - hunger? I haven't experienced hunger while using them. The logic of using something the push out matter that is loosened by the Master-Cleanse makes sense to me, and how much digestion can P&B's require? - perhaps I have just turned it into a glorified bowel cleanse, but I have experienced benefits that seem more MC-like: lowering of blood pressure, a sore warm lump on my outer upper arm seems to have disappeared, glowing skin, a clearing effect on sinuses & reduction in hay fever, not to mention the weight loss that was a welcome by-product. Strangely, I have had swollen upper eyelids for many years and one has come back down completely (making me look a little lop-sided!), but the other is still hooded - don't know what to make of that?!
I would like to do the Master-Cleanse "by the book" later this year to compare the experience.
What have other people found?