Our holistic dentist, who is the most knowledgable person I've ever met regarding natural health and nutrition, recently put my husband on enzymes. The product he uses is called Cell Guard Plus, by Biotec Foods (a division of AgriGenic Food Corp) in Huntington Beach, CA. It is a whole, live food product containing IsoSproutPlex antioxidant concentrate (whatever that is!), Hawaiian pacific plankton, beta carotene, naturally occuring B vitamins, etc. It is expensive, but maybe if you use the really good stuff at first until your system is stronger and healthier, maybe you'd be able to scale back to a less expensive product for the long term. Just a thought.