I'm a little confused.  According to Dr. Judd, use ANY soap to brush teeth 
because there is glycerin in toothpaste.  Well, there's glycerin in most soaps. 
 Why didn't he just say any glycerin-free soap?  Is there something I'm missing?

Cindy

Are you talking about brushing your teeth with glycerine free soap?  If so, 
here is the link. 

 http://gerardjudd.com/goodteeth.htm