character: Calcium
topic: The Role of Nutrition in Maintaining Bone Health
grade: 11
subject: Science
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character: Vitamin D
topic: Essential Nutrients for Bone Strength
grade: 11
subject: Science
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character: Phosphorus
topic: Minerals Supporting Bone Density
grade: 11
subject: Science
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character: Exercise
topic: Physical Activity and Bone Health
grade: 11
subject: Science
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