Metabolic syndrome (Mets) is defined as the collection of risk factors contributing to type 2 diabetes mellitus and cardiovascular disease. Mets is accompanied by oxidative stress and low-grade inflammation. Green coffee is rich in polyphenols called chlorogenic acids (CGA) which possess anti-inflammatory and anti-oxidative characteristics. Thus, we carried out this trial to examine green coffee extract (GCE) effects on oxidative stress, systemic and vascular inflammation in patients having Mets

Inclusion Criteria:

• body mass index of over 25, waist circumference >102 cm in men or >88 cm in women,Fasting blood glucose >100 mg/dL, Triglycerides (TG) > 150 mg/dL, High density lipoprotein cholesterol (HDL-C) <50 in women or <40 in men, Systolic blood pressure (SBP) >130 mmHg and diastolic blood pressure (DBP) >85mmHg

Exclusion Criteria:

• insulin administration for diabetes control, having hypo- or hyperthyroidism, renal failure or other chronic diseases, regular coffee consumption, pregnancy, breastfeeding, taking estrogen, progesterone, corticosteroids, weight loss supplements and obeying unusual weight loss plans