“…In this respect, numerous studies have reported on the benefi cial eff ects of the derivatives of vitamins B 1 and B 6 which are both involved in the metabolism of carbonyl compounds ( La Selva et al, 1996 ;Booth et al, 1997 ;Pomero et al, 2001 ;Voziyan et al, 2002 ;Degenhardt et al, 2002 ;Amarnath et al, 2004 ;Thornalley et al, 2007 ;Nakamura et al, 2007 ). Importantly, the existence of a moderate defi ciency of vitamin B 1 in diabetic patients has been reported and an intake of 250-300 mg/day has been suggested at the thiamine symposium of the European Association of Study for Diabetes (EASD) ( Bloomgarden, 2005 ). In this study we primarily aimed to investigate whether the extent of glycation increases in DNA in diabetes mellitus and secondarily to observe the eff ects of vitamins B 1 and B 6 , on glycation in diabetic nephropathy patients.…”