Biocare enteroguard 150g enteroguard contains fos l glutamine vitamin c n acetyl glucosamine zinc and vitamin a vitamin a c and zinc contribute to the normal function of the immune system and vitamin a contributes to the maintenance of normal mucous membranesmagnesium ascorbate is a bioavailable buffered low acid form of vitamin c and magnesium vitamin c zinc contribute to the protection of cells from oxidative stress magnesium and zinc have a role in the process of cell division zi