Vitamin D
Also known as: Vitamin D3, Cholecalciferol, Calciferol, Sunshine Vitamin
Vitamin D is a fat-soluble vitamin that functions as a hormone in the body. It's essential for bone health, immune function, and numerous other processes. Deficiency is extremely common, especially in northern climates.
Potential Benefits
- Essential for calcium absorption and bone health
- Supports immune system function
- May support mood and reduce depression risk
- May support muscle function
- May reduce risk of certain diseases
What Research Shows
Extremely well-researched vitamin. Benefits for bone health are conclusive. Evidence for other benefits is strong when correcting deficiency, less clear for those with adequate levels.
Dosage Information
1,000-5,000 IU daily for maintenance; higher doses may be needed for deficiency (under medical supervision)
Note: Optimal dosing may vary based on individual factors. Always follow product label instructions or consult a healthcare provider.
Side Effects
- Toxicity possible at very high doses (over 10,000 IU daily long-term)
- Hypercalcemia symptoms: nausea, weakness, confusion
- Kidney problems with chronic excess
Drug Interactions
- Steroids may reduce absorption
- Weight loss drugs (orlistat) reduce absorption
- Statins may be affected
- Diuretics may increase calcium levels
Natural Sources
Products Containing Vitamin D
Medical Disclaimer: This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before taking any supplement, especially if you have medical conditions or take medications.