There is a kind of grounding or discharge that doesn't happen because our feet don't touch the soil enough. There was a discussion about it ca. 3 mos. ago on HV's blog--here's a piece of it, IDK where it started. http://curezone.com/forums/am.asp?i=1663484
You're near Arlington, TX? I'd be psyched to be there--do you ever get over to Austin? That's where they just built their Premier Center. I don't know your finances but you could actually get checked out by Dr Marshall himself or Jeanine Brissley (sp?). They also sell all of their products there so you could get them w/out paying for/waiting for shipping.
The muds are really great for pulling out heavy metal cations (+ charge). What's interesting is that Dr Bob's clay/mud comes with specific instructions and mixing ratios, whereas a company like LL Magnetic Clay just seems to imply "make it as strong as you want--the more the merrier..." Their stuff is good but sometimes I wonder if they themselves actually understand the Science involved.