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The lack of effect of isoflavones on high-density lipoprotein cholesterol concentrations in adolescent boys: a 6-week randomised trial


Dwyer, T and Hynes, K and Fryer, JL and Blizzard, CL and Dalais, FS, The lack of effect of isoflavones on high-density lipoprotein cholesterol concentrations in adolescent boys: a 6-week randomised trial, Public Health Nutrition, 11, (9) pp. 955-962. ISSN 1368-9800 (2008) [Refereed Article]

DOI: doi:10.1017/S1368980007000869


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. © The Authors 2007.

Item Details

Item Type:Refereed Article
Research Division:Health Sciences
Research Group:Epidemiology
Research Field:Epidemiology not elsewhere classified
Objective Division:Health
Objective Group:Public health (excl. specific population health)
Objective Field:Disease distribution and transmission (incl. surveillance and response)
UTAS Author:Dwyer, T (Professor Terry Dwyer)
UTAS Author:Hynes, K (Dr Kristen Hynes)
UTAS Author:Fryer, JL (Ms Jayne Fryer)
UTAS Author:Blizzard, CL (Professor Leigh Blizzard)
ID Code:47502
Year Published:2008 (online first 2007)
Web of Science® Times Cited:2
Deposited By:Menzies Institute for Medical Research
Deposited On:2007-08-01
Last Modified:2014-11-14

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