Vitamin D
Cholecalciferol (D3)
Essential fat-soluble vitamin critical for bone health, immune function, and mood regulation. Deficiency is one of the most common nutritional deficiencies globally, affecting an estimated 1 billion people.
Known Health Benefits
Active Compounds
Cholecalciferol (D3), ergocalciferol (D2), calcifediol
Dosage Guidance
1000–5000 IU daily; optimal 25-OH-D levels 40–60 ng/mL
Always consult a healthcare provider for personalized dosing.
Potential Side Effects
Hypercalcemia at very high doses; nausea, kidney stones; test levels before mega-dosing
Known Drug Interactions
May interact with steroids, weight loss drugs, and cholesterol medications
Evidence Classification
Supported by randomized controlled trials (RCTs), systematic reviews, or meta-analyses published in peer-reviewed journals.
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This entry is for educational purposes only. It is not medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement regimen, especially if you take medications or have health conditions.