Journal of Nutrition and Health

The Korean Nutrition Society (한국영양학회)
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Effect of Soy Isoflavone Supplementation on the Bone Mineral Density and Antioxidant Enzyme Activity in Postmenopausal Women

일부 폐경 후 여성에서 골밀도와 항산화효소 활성에 대한 대두 이소플라본 보충 효과

  • Lee, Haeng-Shin (Nutrition Research Team, Korea Health Industry Development Institute) ;
  • Lee, Da-Hong (Department of Food and Nutrition, Wonkwang University) ;
  • Kim, Mi-Hyun (Department of Food and Nutrition, Kangwon National University) ;
  • Sung, Chung-Ja (Department of Food and Nutrition, Sookmyung Women's University)
  • 이행신 (한국보건산업진흥원 보건영양팀) ;
  • 이다홍 (원광대학교 식품영양학과) ;
  • 김미현 (강원대학교 식품영양학과) ;
  • 승정자 (숙명여자대학교 식품영양학과)
  • Published : 2006.12.31
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Abstract

To elucidate the effect of soy isoflavone supplementation on bone mineral density and antioxidant enzyme activity in 60 postmenopausal women residing in Iksan area were recruited. There were 31 participants in the treatment group and 29 in the control group. The treatment group consumed isoflavone extract capsules daily (which contained 90 mg of soy isoflavones) for 12 weeks. The study compared before and after isoflavone intake in the following areas. Physical examination, diet survey, bone mineral density (BMD) and antioxidant enzyme activity (superoxide dismutase (SOD), glutathione peroxidase (GPx), catalase (CAT) and total antioxidant capacity (TA)). The average age of the treatment group was 64.6 years and that of the control group was 66.5 years. There were no significant differences between the two groups in terms of height, weight and body mass index. Both groups maintained a regular diet pattern in terms of their average daily nutrient intake. There were no significant differences between the treatment group (23.3 mg) and the control group (24.0 mg) in terms of daily isoflavone intake based on diet. Isoflavone supplementation of 12 weeks did not resulted in any significant changes in BMD or parameters of antioxidant enzyme activity, implying the necessity of more intensive intervention for a substantial change. In conclusion, this study revealed that antioxidant enzyme activity holds a significant relationship with the bone mineral density in postmenopausal women and further systematic research on dose and period of isoflavone supplementation is needed to clearify the positive effect of isoflavone on BMD and/or blood antioxidant capacity in postmenopausal women.

Keywords

References

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