Too much vitamin D can raise calcium levels in the blood (hypercalcemia). Possible warning signs include:
1. Nausea, vomiting, or loss of appetite
High calcium levels can upset the digestive system and reduce appetite.
2. Excessive thirst and frequent urination
Too much calcium can affect the kidneys and cause increased thirst or needing to urinate more often.
3. Weakness, fatigue, or confusion
Elevated calcium levels may cause tiredness, difficulty concentrating, or feeling unwell.
4. Kidney-related symptoms
Possible signs include kidney stones or pain related to kidney problems, especially in people who are taking very high doses.
What to do if you notice these symptoms
- Do not increase your vitamin D dose to try to treat symptoms.
- If you are taking high-dose vitamin D and develop concerning symptoms, contact a healthcare professional for advice.
- A blood test can check vitamin D levels and calcium levels if needed.
Important note
Do not stop prescribed vitamin D treatment without speaking with your healthcare professional, especially if it was recommended for a documented deficiency or a specific medical reason.
The safest approach is to take vitamin D at an appropriate dose for your needs and avoid long-term high doses unless monitored by a clinician.
