If you’re referring to a headline such as “Pharmacist issues warning to anyone who takes vitamin D,” the important message is about dose, not that vitamin D is unsafe for everyone.
Vitamin D is an essential nutrient, and supplementation is recommended for some people. However, taking too much for too long can cause vitamin D toxicity. Excess vitamin D raises calcium levels in the blood, which can lead to nausea, vomiting, excessive thirst, weakness, kidney stones, kidney damage, and—in severe cases—heart problems.
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SPS – Specialist Pharmacy Service
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What to watch for
Check the strength of your supplement. Vitamin D is commonly listed in micrograms (µg/mcg) or IU.
For most adults, the NHS advises 10 micrograms (400 IU) daily when supplementation is appropriate.
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nhs.uk
Don’t routinely exceed 100 micrograms (4,000 IU) per day unless a healthcare professional has specifically prescribed a higher dose.
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nhs.uk
Be careful about taking more than one product containing vitamin D—for example, a vitamin D tablet plus cod-liver oil or a multivitamin.
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NHS Cornwall and Isles of Scilly
High-dose vitamin D treatments are sometimes medically appropriate for treating deficiency, but they should be taken according to the prescribed schedule. Accidental daily use of a dose intended to be weekly or monthly has caused serious toxicity.
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NHS England
So, don’t stop a medically prescribed vitamin D treatment because of a scary headline. The concern is primarily inappropriate or excessive supplementation.
If you tell me the vitamin D strength you’re taking (for example, 1,000 IU, 5,000 IU, or 50,000 IU) and how often you take it, I can explain whether that dose is generally considered low, moderate, or high.
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