This  study  features  an  assessment  of  multiple  density  functionals  in  calculating  the  molecular structures  and  inherent  properties  in  simple  carbohydrates  participating  in  nonenzymatic  glycation involving  amino acids  and  proteins  in  Maillard  reactions.  The  occurrences  of  nucleophilic  addition involving nonenzymatic glycation, initiate protein glycation reaction involving a carbonyl group derived...