Vitamin D is important for bone health, muscles, and normal immune function, but too much vitamin D—usually from excessive supplementation rather than food or sunlight—can cause problems because it may raise calcium levels in the blood (hypercalcemia).
If you take vitamin D supplements, speak with a healthcare professional if you develop symptoms such as:
1. Nausea, vomiting, or loss of appetite
High vitamin D levels can increase calcium in the blood, which may upset the digestive system.
2. Unusual thirst or frequent urination
Excess calcium can affect the kidneys, leading to increased thirst and needing to urinate more often.
3. Weakness, fatigue, or confusion
Very high calcium levels may cause tiredness, muscle weakness, difficulty concentrating, or confusion.
4. Kidney-related symptoms
High vitamin D intake can contribute to kidney stones or kidney strain. Symptoms may include:
- Flank or back pain
- Painful urination
- Blood in the urine
Important note
Do not stop prescribed vitamin D automatically without discussing it with your doctor. The right dose depends on your blood vitamin D level, health conditions, and other medicines you take.
If you tell me:
- your vitamin D dose (for example, 1,000 IU daily, 50,000 IU weekly, etc.),
- how long you have been taking it,
- and any symptoms you have,
I can help you understand whether they match possible vitamin D side effects.
