Object of study: Determination the effect of Curcuma longa extract supplementation on metabolic parameters (lipid profile, blood glucose and insulin sensitivity) and anthropometric parameters in obese people.Study design: random, double blind, control with placebo, one research center. Study population: 70 obese subjects divided into 2 groups will receive turmeric extract (500 mg daily) and placebo control group (receiving 500 mg of starch per day). study groups will receive capsules for 90 days. Inclusion criteria: Willingness to cooperate, obese people with a body mass index over 30, age 20-65 years
Exclusion criteria: Pregnancy and lactation, liver and kidney diseases, cancer, inflammation, digestive problems, special diet, hypo and hyper thyroid, recent surgery, anti coagulation, anemia, diabetes, allergies to the ginger family, turmeric and consumption of beverages alcohol, drugs and supplements for weight control and people with very low or high physical activity.first people will fill in Informed consent form,demographic and physical activity questioners and then randomly assigned to either the intervention group (receiving 500 mg extract ofturmeric) and control (receiving 500 mg of starch day).Both groups will receive 2 capsules for 90 days daily after meals. starch will be used as a placebo. height, weight, waist and hip in the beginning and end of the study will be measured.To measure the glucose, HbA1C, insulin, and lipid and lipoproteins, 5 mL of blood before and at the end of the period will be taken.Both systolic and diastolic blood pressure measurements at the beginning and end of the study will be conducted in all patients