Abstract：
BACKGROUND:A substantial fall in high-density lipoprotein cholesterol (HDL-C) during puberty in boys, but not girls, has been reported in Western populations. The fall in boys is believed to be due to hormonal changes--androgens have been shown to be associated with lower HDL-C, whereas oestrogens are associated with higher HDL-C. The fall in HDL-C during puberty was not observed, however, in a study of Moslem boys in Israel, nor in a group of Japanese boys. A diet high in phyto-oestrogens may account for the lack of a fall in HDL-C in these populations. OBJECTIVE:To examine the effect of dietary supplementation with phyto-oestrogens on the HDL-C concentration of adolescent boys from a Western population. We hypothesised that dietary supplementation of 50 mg of the isoflavones daidzein and genistein would produce a 12% higher HDL-C concentration than in controls at the end of a 6-week intervention period. DESIGN:A randomised controlled trial. SETTING:Hellyer College in Burnie (Tasmania, Australia). SUBJECTS:Adolescent boys (aged 16-18 years) were recruited through a letter sent to parents. A total of 132 eligible participants enrolled and five subjects withdrew from the trial. RESULTS:No significant increase in HDL-C was observed in the treatment group (-0.02 mmol l(-1), standard error (SE)=0.03, P = 0.53) or the placebo group (0.05 mmol l(-1), SE = 0.03, P = 0.11). CONCLUSIONS:Factors other than isolated dietary isoflavones may be responsible for the lack of fall in HDL-C during puberty in Japanese and Moslem boys.
journal_name
Public Health Nutrjournal_title
Public health nutritionauthors
Dwyer T,Hynes KL,Fryer JL,Blizzard CL,Dalais FSdoi
10.1017/S1368980007000869subject
Has Abstractpub_date
2008-09-01 00:00:00pages
955-62issue
9eissn
1368-9800issn
1475-2727pii
S1368980007000869journal_volume
11pub_type
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