Calcium intake and bone mass development among Israeli adolescent girls
G S Rozen1, G Rennert, H S Rennert
1Department of Diet and Nutrition, Rambam Medical Center, Haifa, Israel. rgeila@rambam.health.gov.il
Journal of the American College of Nutrition
|July 11, 2001
Summary
Adolescent girls with low calcium intake and other nutritional deficiencies may face challenges in developing healthy bones. While current bone mass appears normal, future osteoporosis risk remains a concern.
Area of Science:
- Nutritional Science
- Bone Health
- Adolescent Health
Background:
- Dietary habits and lifestyle significantly influence bone health during adolescence, a critical period for bone accretion.
- Understanding these factors is crucial for preventing future skeletal disorders like osteoporosis.
Purpose of the Study:
- To investigate the relationship between dietary and lifestyle habits and bone health in adolescent Israeli females.
- To assess calcium intake and identify potential nutritional deficiencies affecting bone development.
Main Methods:
- A cross-sectional study involving 2,000 adolescent Israeli girls (mean age 14.5) who completed dietary and personal history questionnaires.
- Bone mineral content and density were measured in a subset of 112 girls with low calcium intake (below 800 mg/day).
Main Results:
- Average calcium intake was 1,260 mg/day, but 20% consumed less than 800 mg/day.
- Low calcium diets were often deficient in phosphorus, magnesium, iron, and zinc.
- No significant difference in bone mineral density was observed in the low calcium intake group compared to controls at this stage, but a strong positive correlation existed between bone mineral density and body weight.
Conclusions:
- Low calcium intake, combined with other nutritional deficiencies and delayed menarche, may impede optimal bone formation during adolescence.
- While current bone mass is not significantly lower in the low calcium group, the long-term impact on osteoporosis risk requires further investigation.
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