Thank you so much for the links. Will definitely check them out. I only got halfway through this thread today, but will read some more before bed. I plan to be cautious about DE, some of the stories were pretty eye opening! Haha!
On another site there was (and may still be!) a very long thread about people using DE and it sounded so good I started taking it, had for cats and garden already.
But it just turned to cement in my innards.
DH takes it without problems and feels that his hair and nails are stronger and growing better.