please tell me about vitamins and also give me some additional information

i) Vitamins are naturally occuring carbon compounds with low molecular weight ii) These are essential dietary factors iii) These are required in minute quantities for the maintenance of normal health of organisms iv) Their deficiency in human body causes diseases (or) disorders v) They participate in the production of co-enzymes and also in the regulation of biochemical process vi) Plant can synthesise all vitamins. Animals can synthesise few but not all vitamins vii) Human body can synthesis vitamin A, some members of vitamin B complex and vitamin K is synthesised by micro-organisms present in the intestinal tract of human beings