Thanks for your interest. It says on the packet its main ingredients are Neucleotides of RNA. Nuceotides describes the technology which this company seems to have invented. Other ingredients are Vitamin B5, Sodium Citrate, Riboflavin, Vitamin B2 and some vegetarian ingredients in the capsules. Apparently the 'nucelotides' of RNA help to support the body's natural cell regeneration process - especially colonic functioning and intestinal balance. I think that basically it promotes natural cell regenration in the intestines more quickly than normal and I am sure that this would account for the feeling of intestinal 'well being' which I am enjoying. The research into the product has been sponsored by the DTI (Department of Trade & Industry)in Great Britain and I know that they would not get involved without the product or concept being thoroughly checked out.