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High vitamin D levels above 375 can cause serious symptoms like nausea, confusion, and muscle weakness in adults
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Most vitamin D overdoses happen due to excessive supplement intake, not from sunlight or food sources
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Adults should not exceed 100 mcg (4,000 IU) daily from all sources to avoid toxicity and health risks
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Symptoms such as loss of appetite, dehydration, excessive thirst, and frequent urination may indicate vitamin D overdose
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If vitamin D levels are extremely high, they can lead to kidney stones and can cause kidney failure if not managed immediately
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Never take high-dose vitamin D supplements without medical advice, even if you feel you need more for deficiency
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Doctors can recommend safe, monitored doses above upper limits temporarily if you have a vitamin D deficiency
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Your skin naturally regulates vitamin D production, so you cannot get harmful levels from sun exposure alone
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Pregnant and breastfeeding, women should stick to the safe upper limit of 100mcg daily, unless prescribed otherwise
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Children have lower upper limits based on age. Excessive vitamin D, can cause serious harm, even in young ones