If you’re fact-checking “Important Warning from Doctors: Stop Taking Vitamin D Immediately If You Have These 4 Symptoms,” the headline is partly based on a real concern but is too alarmist.
Too much vitamin D can cause vitamin D toxicity, usually from excessive supplementation. It raises calcium levels in the blood and can potentially damage the kidneys and cause abnormal heart rhythms.
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Odyssey Database System
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Symptoms that can occur with excessive vitamin D include:
Nausea or vomiting
Loss of appetite or unexplained weight loss
Marked thirst and frequent urination
Muscle weakness, fatigue, or confusion
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MedlinePlus
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However, having one of these symptoms doesn’t prove that vitamin D is the cause. They can occur with many other conditions.
Also, don’t automatically stop a vitamin-D prescription that was given to treat a documented deficiency. Some people legitimately need doses above the usual upper limit for a period of time under medical supervision.
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Odyssey Database System
For adults, the general tolerable upper intake level is 4,000 IU (100 mcg) per day from all sources, although a clinician may prescribe more temporarily for specific medical reasons.
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Odyssey Database System
Bottom line: The real warning isn’t “stop vitamin D if you have four symptoms.” It’s “if you’re taking high-dose vitamin D and develop symptoms suggestive of toxicity, contact your healthcare professional and have the situation evaluated.” A blood test can check vitamin D and calcium levels when appropriate.
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MedlinePlus
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