A headline like this is often used to attract attention, but the reality is more nuanced: vitamin D is important for health, and most people who take appropriate doses do not have problems. However, taking too much vitamin D, especially high-dose supplements over time, can cause vitamin D toxicity (hypervitaminosis D), which raises calcium levels in the blood.
Possible warning signs that may require stopping supplements and seeking medical advice include:
- Nausea, vomiting, or loss of appetite
High calcium levels can irritate the digestive system. - Unusual thirst and frequent urination
Excess calcium can affect the kidneys and fluid balance. - Weakness, fatigue, confusion, or dizziness
Elevated calcium levels can affect muscles and the nervous system. - Kidney-related symptoms
Such as flank pain, kidney stones, or changes in urination.
If you experience these symptoms while taking vitamin D—especially high doses (for example, prescription-strength amounts or large daily doses without medical guidance)—contact a healthcare professional before continuing.
Avoid stopping a medically prescribed vitamin D treatment without discussing it with the prescriber. The safest approach is to use the dose recommended for your needs and avoid taking extra supplements unless there is a reason to do so.
