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Dear Dr. Kasarda:
It has ocurred to me that silica (or silicon) may be beneficial in
healing the gut wall since it is essential for the maintainance of mucous
membrane linings in the body. Horsetail is an excellent source of natural
silica and I was wondering if it is gluten free?  Thank you for all your
interesting and very informative postings.
                                -Portia
(parent of an autistic two and a half year old with celiac symptoms)