publication 2009 Assessment of riboflavin status by dietary and concentration in red blood cell of adult Saudi in Riyadh city- Saudi Arabia more of publication Assessment of riboflavin status by dietary and concentration in red blood cell of adult Saudi in Riyadh city- Saudi Arabia by Al-Assaf, Abdullah., Osman, Magid., Al-Hamede, Faisal and Al-Numair, Khalid 2009