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Story summary
- Excessive vitamin D poses health risks and may cause toxicity at high doses, especially in children and older adults.
- Vitamin D supports calcium absorption and immune function, but toxicity can cause nausea, fatigue, and kidney issues.
- From 2000 to 2014, the United States reported over 25,000 vitamin D toxicity incidents.
- Experts recommend a daily intake of 15 to 20 mcg (600 to 800 IU) unless a doctor advises otherwise.
