Evidence-based cost-benefit analysis of Vitamin D3.
Essential for bone health, immune function, and may support mood regulation and cardiovascular health
Individuals with limited sun exposure, older adults, those living in northern climates, or with diagnosed deficiency
Fat-soluble vitamin requiring monitoring to avoid toxicity. Take with meals containing fat for optimal absorption
Compare other supplements by cost and evidence
Educational and research purposes only. Always consult a healthcare professional before starting any supplement regimen. ROI is modelled at $100,000 per quality-adjusted life year; see the methodology.