I believe you that you had a beneficial feeling of blood rushing through the brain and cleaning it out. I think the trick is, how do we interpret this? Is it metals leaving the brain, or is it something else, perhaps something beneficial, just not an actual dislodging of heavy metal molecules crossing the BBB, which any chemist will tell you takes a chelating agent that passes the BBB. Not to sound ungrateful, though, you are a real ambassador for the PHD diet, sprinkling every post with links and auxiliary information, references where we can look things up, all that good stuff. I've done some reading around the web and I'm convinced that prebiotics are very important. The impression I'm getting is that the gut has 100 trillion organisms and the species are established shortly after birth. The ratios do change but not by a whole lot. It makes you wonder how much good you can do by pouring in a few billion of a few strains. BUT... you can change the situation very easily by pouring in food for the bacteria that are there, wisely chosen food that can influence ratios and locations and growth patterns. I'm still trying to reconcile a low-FODMAP diet with the PHD, but the PHD makes this idea of "resistant starch" very clear. So there's no mystery to the PHD diet. It passes common sense, it passes a more detailed inspection, and it solves several problems raised in the study of other things. Here's my only gripe. Did they have to call it by a name with such a distasteful marketing ring to it? You should know that I'm the anti-consumer... advertising doesn't work on me, turns me the other way. You are lucky that you are a good writer and that I recognized that before I knew you were talking about "The Perfect Health" Diet or else I would have skipped it.