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Why it's important: Needed for building strong bones until you reach your mid-20s, and after that, it helps keep your bones healthy and slows down bone density loss to prevent osteoporosis later in life; may reduce PMS symptoms; may prevent certain cancers
Signs of a deficiency: Numbness or tingling of the fingers, muscle cramps, fatigue, poor appetite, osteoporosis
Recommended daily intake (RDI): 1,000 mg
Vegan sources: