Here are some articles by Dr. Howenstein.

http://www.life-enthusiast.com/index/Articles/Howenstine/Prill_Beads_1
  ----- Original Message ----- 
  From: Bob Banever 
  To: silver-list@eskimo.com 
  Sent: Saturday, May 22, 2010 4:31 PM
  Subject: Re: CS>Prill beads


  bodhisattva,

        No, but Dr. James Howenstein MD told me to be aware of this.  He 
claimed to have had problems with Chinese varieties and told be to steer clear 
of them.  He is a big believer of prill beads, just not Chinese made ones.

        Bob
    ----- Original Message ----- 
    From: bodhisattva 
    To: silver-list@eskimo.com 
    Sent: Saturday, May 22, 2010 3:10 PM
    Subject: Re: CS>Prill beads


    Do you have any links about the Chinese ones containing this stuff? I 
suspect a herx, he has absolutely no evidence they poisoned him, but the 
symptoms he talked about sound like a very typical herximer reaction.

    Interesting, some sellers I saw awhile back, claimed they don't "Wear out", 
which seemed dubious.  However, a point to note, I calibrated a jar of water 
with them in it on Youtube at 1000, didn't tell Marshall, he calibrated them at 
999.  Another dowser found an 800% improvement in water quality.

    So it is more than just Magnesium, Magnesium doesn't come in anywhere near 
these levels.

    Bob Banever wrote: 
      It's entirely possible that the prill beads he purchased poisoned him.  
Chinese made beads have been shown to contain high levels of lead and other 
impurities that are toxic.  

      Bob
        ----- Original Message ----- 
        From: bodhisattva 
        To: silver-list@eskimo.com 
        Sent: Saturday, May 22, 2010 12:59 PM
        Subject: Re: CS>Prill beads


        I'm ordering some prills, I will calibrate several differnet ones and 
see what I find before purchasing, and run some tests after. I have a huge 
water testing kit of various things I can test.

        Some guy claims prill poisoned him, but he's a dork, what happened was, 
he was so acidic, he probably "Herxed".. A lot of people herx, even orgonite 
can cause a herx.. Negative ionizers caused a month long herx for some in this 
household.. LOL