The headline “Pharmacist issues warning to anyone who takes Vitamin D” is likely referring to the fact that, while vitamin D is important, taking too much can be harmful.
Vitamin D helps the body absorb calcium and supports:
- Bone health
- Muscle function
- Immune system function
However, high doses of vitamin D supplements taken for long periods can cause vitamin D toxicity, which can lead to too much calcium in the blood (hypercalcemia).
Possible warning signs of excessive vitamin D include:
- Nausea or vomiting
- Loss of appetite
- Constipation
- Excessive thirst
- Frequent urination
- Weakness or fatigue
- Confusion
- Kidney problems, including kidney stones in some cases
People who should be especially careful include those who:
- Take high-dose vitamin D supplements
- Take multiple supplements containing vitamin D
- Have kidney disease
- Have conditions affecting calcium levels
- Are taking certain medications that affect vitamin D or calcium balance
For most people, taking a recommended dose—especially when a deficiency has been identified—is safe. The risk usually comes from megadoses or unnecessary long-term supplementation, not normal intake.
If you share the dose of vitamin D you’re taking (for example, 1,000 IU, 5,000 IU, or 50,000 IU) and how often you take it, I can help put the amount into context.
