Vitamin D is important for bone health, muscles, and immune function, but taking too much vitamin D can cause toxicity (usually from excessive supplementation rather than normal sunlight exposure or recommended doses). High vitamin D levels can raise calcium levels in the blood (hypercalcemia) and cause symptoms.
Possible warning signs that you may be getting too much vitamin D include:
- Nausea, vomiting, or loss of appetite
- High calcium levels can upset the digestive system.
- Unusual thirst and frequent urination
- Excess calcium can affect the kidneys and fluid balance.
- Weakness, fatigue, or confusion
- Elevated calcium can affect muscles and the nervous system.
- Kidney-related symptoms
- Flank pain, kidney stones, or changes in urination can occur in some cases.
If you are taking a high-dose vitamin D supplement and develop these symptoms, it is wise to stop taking additional doses until you speak with a healthcare professional. Do not stop a vitamin D prescription without medical advice if it was prescribed for a diagnosed deficiency or medical condition.
People at higher risk of vitamin D problems include those taking very high doses, using multiple vitamin D-containing supplements, or having kidney disease, certain hormone disorders, or conditions affecting calcium metabolism.
If you tell me your vitamin D dose (IU amount), how often you take it, and why you started it, I can help you assess whether it is a typical or unusually high amount.
