Its funny, I had come across the image of the beet juice flush a few days ago and thought about recreating the experiment. Yet I forgot to buy any fresh beets. I may go ahead and try the food coloring tonight, I thought about dying both the Epsom Salt drink and the oil/juice drink red. This should prove that the stones are not a chemical reaction between Epsom Salts and olive oil.
FYI-The Ozarks are a mountain range in the southern United States, mostly in Missouri and Arkansas (Bill Clinton's home state). Very different from London I would imagine, I live in a rural area, miles from a paved road. "Town" is nearly ten miles away, the nearest city of any size is almost thirty miles from here. Its snowing heavily now. Thank goodness I have a couple of days off work, the roads are impassable when there's snow and ice; yet, its so beautiful here in the country.