Elyas Nattagh-Eshtivani is an assistant professor at Gonabad University of Medical Sciences, Gonabad, Iran. He does research in Nutrition and Dietetics, Chronic Diseases and Nutritional Biochemistry. The current projects of Elyas are “The effect of propolis supplementation on inflammatory factors and oxidative status in women with rheumatoid arthritis “, and 'reviews on mechanisms of foods and nutrients on main causes of rheumatoid arthritis.