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Obesity and Decreased Hormone Production

April 12, 2011 by  
Filed under Diet and Lifestyle

Researchers writing in the medical journal Clinical Endocrinology say that “Obesity may predict greater decline in testosterone and SHBG levels with age.”

Derby CA, Zilber S, Brambilla D, Morales KH, McKinlay JB. Body mass index, waist circumference and waist to hip ratio and change in sex steroid hormones: the Massachusetts Male Ageing Study. Clin Endocrinol (Oxf). 2006 Jul 1;65(1):125-31.

From the study abstract:
Objective Cross-sectional data suggest that obesity, particularly central obesity, may be associated with decreased production of sex steroid hormones in men. However, longitudinal hormone data on men in relation to obesity status are limited. Previous studies have not consistently demonstrated whether sex steroids are associated specifically to body mass index or to measures of central obesity.

Our objective was to examine the relation of obesity and of central obesity to longitudinal change in sex steroid hormones in men.

Measurements Free and total testosterone (FT and TT), dehydroepiandrosterone sulphate (DHEAS), and sex hormone-binding globulin (SHBG) were assessed using standardized methods. Health behaviours and medical history were obtained by structured interview.

Repeated measures regression was used to describe trends in steroid hormones and SHBG in relation to obesity status, adjusting for age, smoking, alcohol, comorbidities, and physical activity.

Results: Obesity was associated with decreased levels of total and free testosterone, and of SHBG at follow-up relative to baseline. For any given baseline concentration of TT, FT or SHBG, follow-up levels were lowest among men who remained obese or who became obese during follow-up.

This was true for all three indices of obesity. Central adiposity was associated with lower DHEAS levels at follow-up, while elevated body mass index was not.

Conclusions: Obesity may predict greater decline in testosterone and SHBG levels with age. Central adiposity may be a more important predictor of decline in DHEAS than is body mass index.

Written by Dr. Marc Darrow, M.D.

Dr. Darrow is a world recognized specialist in many chronic disorders. He has been featured in national publications, and television and radio shows, for his innovative approach to medicine. As the medical director of the Darrow Wellness Institute in West Los Angeles, Dr. Darrow has helped create an age management program for those individuals interested in maintaining a youthful, healthy vigor for adults through “middle age” and well into the senior years.

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