Nicotinamide increases thyroid radiosensitivity by stimulating nitric oxide synthase expression and the generation of organic peroxides. - Agote Robertson,M.; Finochietto,P.; Gamba,CA.; Dagrosa,MA.; Viaggi,ME.; Franco,MC.; Poderoso,JJ.; Juvenal,GJ.; Pisarev,MA. (Horm Metab Res, 2006)