The metabolic syndrome has been recognized as a proinflammatory state. It has been shown that many different diets such as Mediterranean diet, DASH diet, Foods with low glycemic index and low saturated fat diet, independent of weight loss, may be effective in improving the metabolic syndrome. Our objective was to evaluate the effect of Ramadan fasting on High-sensitive C-reactive protein (hs-CRP) and fibrinogen levels in metabolic syndrome.