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Dairy intakes affect bone density in the elderly.

Linda D McCabe1, Berdine R Martin, George P McCabe

  • 1Purdue University, West Lafayette, IN, USA.

The American Journal of Clinical Nutrition
|September 28, 2004
PubMed
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Higher dairy intake is linked to better hip bone mineral density (BMD) in elderly men, but not women. Calcium supplementation, however, helped reduce bone loss in white men and women.

Area of Science:

  • Gerontology
  • Nutritional Science
  • Bone Health

Background:

  • Investigating race and sex disparities in diet's impact on elderly hip bone mineral density (BMD).
  • Understanding the relationship between nutrient intake and BMD across different demographic groups.

Purpose of the Study:

  • To examine the association between diet, specifically dairy and nutrient consumption, and hip BMD in elderly white and black men and women.
  • To evaluate the effect of diet on changes in BMD within a white cohort undergoing a calcium and vitamin D trial.

Main Methods:

  • Utilized the Health Habits and History Questionnaire for dietary assessment in 289 white women, 116 white men, 265 black women, and 75 black men.
  • Assessed total hip and femoral neck bone mineral density (BMD) and changes in BMD cross-sectionally and longitudinally.

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  • Analyzed data adjusting for age, race, and weight.

    • Main Results:

    • Blacks and men reported higher calcium intakes than whites and women, respectively.
    • Dairy calcium intake positively correlated with total hip BMD in men (r=0.23, P<0.005) but not in women (r=0.02, P=0.12).
    • Calcium supplementation reduced bone loss in white participants under 72 years old consuming less than 1.5 servings of dairy daily.

    Conclusions:

    • Higher dairy consumption is associated with greater hip BMD in elderly men, but not women.
    • Calcium supplementation demonstrated a protective effect against bone loss in a longitudinal study of white individuals.
    • Findings highlight potential sex differences in dietary impacts on bone health in older adults.