A headline like “Pharmacist issues warning to anyone who takes Vitamin D” can sound alarming, but vitamin D is not dangerous for most people when taken at an appropriate dose. The concern is mainly about excessive supplementation, taking multiple products containing vitamin D, or using high doses without medical guidance.
Too much vitamin D can cause high calcium levels in the blood (hypercalcemia). Possible warning signs include:
- Nausea, vomiting, or loss of appetite
- Unusual thirst or frequent urination
- Weakness, fatigue, or confusion
- Kidney-related problems, such as kidney stones or changes in urination
People who should be especially careful with vitamin D supplements include those with:
- chronic kidney disease
- Conditions affecting calcium levels (such as some parathyroid disorders)
- A history of kidney stones
- Use of high-dose vitamin D prescribed for a deficiency
Vitamin D can be helpful when someone has a deficiency, but the right amount depends on factors such as age, diet, sunlight exposure, health conditions, and blood test results.
If you take vitamin D, it’s useful to know:
- The dose (for example, 1,000 IU daily or 50,000 IU weekly)
- Whether it was prescribed or self-started
- Any other supplements you take
If you share your vitamin D dose and why you’re taking it, I can help put it into context.
