Journal of North Khorasan

Background& Objectives: In adolescence, amount and type of fatty acids intake is one of the factors affecting dyslipidemia in adulthood. The aim of the present study was to evaluate serum lipids and lipoproteins concentration in adolescents and its relationship with the amount and type of fat intake.

Materials and methods: This cross-sectional study was conducted on 717 adolescents, aged 10-19 years, within the fourth framework of Tehran Lipid and Glucose Study. Usual dietary intakes were assessed by a valid and reliable food frequency questionnaire. To measured concentration of serum lipid profile a fasting venous blood sample were obtained from all participants.

Results: Serum triglyceride concentration was significantly higher in boys than in girls (90.5 vs 79.0 mg/dl; P=0.005). After adjustment for age, triglyceride showed a significant decreasing trend according to quartiles of percent of energy intake from PUFA, in both sexes (6.0 and 23.2 mg/dl respectively, P<0.05). Also, a significant increase in serum HDL-C was observed with increasing in percent of energy intake from PUFA in boys and with decreasing in percent of energy intake from saturated fatty acids in girls (4.0 and 3.4 mg/dl respectively, P<0.05).Other components of the serum lipid profile had no significant relationship with total energy intake, percentage of energy intake from fat, saturated fatty acids, PUFA, MUFA and trans in boys and girls.

Conclusion: It seems that the percentage energy intake from total fat and variety of fatty acids is not the most important factor influencing the level of serum lipids and lipoproteins and the role of other factors must also be assessed.

Keywords: lipid profile, fat, cholesterol, fatty acids