Vitamin D3 (cholecalciferol) is essential for calcium absorption, bone health, and immune function.
1000-4000 IU daily, depending on individual needs and blood levels.
Strong evidence from multiple high-quality studies.
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Meta-analysis
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Key Outcomes
Reduced fracture risk across 12 trials
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Meta-analysis
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Confirmed reduced respiratory infections across 25 trials
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Review
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Highlighted importance for overall health
Disclaimer: This information is for educational purposes only and not intended as medical advice. Please consult with a healthcare professional before taking any supplements, especially if you have underlying health conditions or are taking medications.