Vitamin D
Cholecalciferol | Ergocalciferol | Calciferol
vitaminPregnancy: Considered safe
Overview
Fat-soluble vitamin essential for calcium absorption, bone health, and immune function. Often called the 'sunshine vitamin' because it's synthesized in the skin upon sun exposure.
Uses
Vitamin D Deficiencystrong evidence
Effective for treating and preventing vitamin D deficiency.
Osteoporosis Preventionstrong evidence
Combined with calcium, helps maintain bone density.
Immune Supportmoderate evidence
May reduce risk of respiratory infections.
Dosage
Typical dosage: 1000-2000 IU daily
Maximum dosage: 4000 IU daily (upper limit)
Timing: With meals containing fat
Side Effects
- Nausea at high doses
- Hypercalcemia with toxicity
Interactions
Thiazide diureticsmoderate
May increase calcium levels
Contraindications
- Hypercalcemia
- Kidney stones
Looking for patient-friendly information? Visit RemedyDoor for an easy-to-read guide about Vitamin D.