title: Fish intake, erythrocyte n-3 fatty acid status and metabolic health in Danish adolescent girls and boys.
abstract: Marine n-3 long-chain PUFA (n-3 LCPUFA) may have a beneficial effect on several aspects of the metabolic syndrome (dyslipidaemia, insulin resistance, hypertension and abdominal obesity). The metabolic syndrome is increasing in prevalence during adolescence, but only few studies have investigated the effects of n-3 LCPUFA in adolescence. The present study examines associations between fish intake (assessed by a 7 d pre-coded food diary), erythrocyte (RBC) DHA status (analysed by GC) and metabolic syndrome measures (anthropometry, blood pressure and plasma lipids, insulin and glucose) in 109 17-year-old children from the Copenhagen Birth Cohort Study. Of the children, 8 % were overweight or obese and few showed signs of the metabolic syndrome, but all the metabolic syndrome variables were correlated. Median fish intake was 10·7 (interquartile range 3·6-21·2) g/d. Boys tended to have a higher fish intake (P = 0·052), but girls had significantly higher RBC levels of DHA (P = 0·001). Sex and fish intake explained 37 % of the variance in RBC-DHA (P < 0·001). After adjusting for confounders, high DHA status was found to be significantly correlated with higher systolic blood pressure (P = 0·014) and increased fasting insulin (P = 0·018), but no adverse association was observed with the mean metabolic syndrome z-score. Overall, the present study showed the expected association between fish intake and RBC-DHA, which in contrast to our expectations tended to be associated with a poorer metabolic profile. Whether these results reflect the physiological function of n-3 LCPUFA, lifestyle factors associated with fish intake in Denmark, or mere chance remains to be investigated.
authors: Department of Human Nutrition, Faculty of Life Sciences, University of Copenhagen, Frederiksberg, Denmark. ll@life.ku.dk
authors: Lotte
authors: L
authors: Lauritzen
authors: Laurine B S
authors: LB
authors: Harsløf
authors: Lars I
authors: LI
authors: Hellgren
authors: Maiken H
authors: MH
authors: Pedersen
authors: Christian
authors: C
authors: Mølgaard
authors: Kim F
authors: KF
authors: Michaelsen
mesh_terms: D000293:Adolescent; D000818:Animals; D015331:Cohort Studies; D003430:Cross-Sectional Studies; D003718:Denmark; D004032:Diet / Q000009:adverse effects*; D015930:Diet Records; D004281:Docosahexaenoic Acids / Q000097:blood; D004912:Erythrocytes / Q000378:metabolism*; D015525:Fatty Acids, Omega-3 / Q000008:administration & dosage / Q000009:adverse effects / Q000097:blood*; D005260:Female; D005399:Fishes; D006801:Humans; D006946:Hyperinsulinism / Q000209:etiology; D006973:Hypertension / Q000209:etiology; D007333:Insulin Resistance; D008297:Male; D024821:Metabolic Syndrome / Q000097:blood / Q000209:etiology* / Q000503:physiopathology; D050177:Overweight / Q000503:physiopathology; D011446:Prospective Studies; D017747:Seafood / Q000009:adverse effects; D012727:Sex Characteristics
chemical_list: D015525:Fatty Acids, Omega-3; D004281:Docosahexaenoic Acids