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Vegetarian lifestyle and bone mineral density
A G Marsh1, T V Sanchez, O Michelsen
1Department of Home Economics, Andrews University, Berrien Springs, MI 49104.
The American Journal of Clinical Nutrition
|September 1, 1988
Summary
Dietary protein impacts bone mineral loss post-menopause. Lactoovovegetarian diets are linked to significantly less bone mineral loss compared to omnivore diets in older women.
Area of Science:
- Nutrition Science
- Gerontology
- Bone Metabolism
Background:
- Dietary protein intake and type are critical factors influencing bone health.
- Menopause is associated with accelerated bone mineral loss, increasing fracture risk.
Purpose of the Study:
- To investigate the long-term effects of dietary protein on bone mineral density (BMD) in postmenopausal women.
- To compare bone mineral loss in lactoovovegetarian women versus omnivore women.
Main Methods:
- Longitudinal study over 10 years utilizing direct photon absorptiometry to measure BMD.
- Analysis of dietary intake, including Ca:P ratio and acid-base formation, in 1600 women.
- Correlation of sulfur intake with urinary titratable acidity.
Main Results:
- Women on lactoovovegetarian diets for at least 20 years had 18% less bone mineral loss by age 80, compared to 35% in omnivores.
- Significant differences in dietary Ca:P ratio and acid-base load (p < 0.001) were observed, independent of overall nutrient intake.
- Increased sulfur intake directly correlated with increased urinary titratable acidity.
Conclusions:
- Dietary patterns, particularly protein source and its impact on acid-base balance, play a crucial role in mitigating postmenopausal bone mineral loss.
- Lactoovovegetarian diets may offer a protective effect against age-related bone density reduction in women.