The aim of this study was to determine the effects of Sea Buckthorn pulp oil intake (800 mg/day, 60 days) in hypertriglyceridemic waist phenotype obese children. Forty one obese children (10-18 years old) and thirty controls were involved. Modified ATP III (Adult Treatment Panel III) cut points for serum triglycerides (>= 110 mg/dL) and waist circumference (>= 90th percentile for age and sex) were used to divide obese children. Hypertriglyceridemic waist fenotype (n=17) and obese nonhypertriglyceridemic (n=24) obese groups were formed. Metabolic and inflammatory parameters were measured before and after sea buckthorn terapy. Metabolic syndrome was present in 14.25% obese children and all these subjects were from hypertriglyceridemic waist fenotype group. Comparing the obese groups, in hypertriglyceridemic waist fenotype obese children, the values for triglycerides (p<0.001), uric acid (p<0.004), C peptide (p<0.04), leptin (p<0.04), alanine aminotransferase (ALT) (p<0.05) and waist circumference (p<0.02), were increased, while high density lipoprotein-cholesterol (HDL-C) (p<0.01) was decreased. After treatment, triglycerides, blood pressure, leptin, C peptide and ceruloplasmin were decreased, while albumin was increased. In conclusion, in hypertriglyceridemic waist phenotype obese children, sea buckthorn pulp oil terapy (800mg/day, 60 days) prevents metabolic syndrome, by reducing triglyceridemia and blood pressure. Also, the treatment has a weak antiinflammatory effect.