Read what the company puts in it to make it Perma-Guard and make up your own 
mind.  It is NOT Food Grade!  I found NO REFERENCE to food grade in their 
website write-up.
   
  Bill Keen

grace1...@aol.com wrote:
      The Perma-Guard was sold to me to be used to mix with wheat for storage.  
The information that came with it said that the owner of the company had it 
tested for minerals, and gave the the mineral content; it also said he takes it 
every day as a mineral supplement.
   
  Are you saying that Perma-Guard is not safe for for internal consumption?
   
  Jill