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