Hypervitaminosis DSymptoms, Doctors, Treatments, Advances & More
Learn About Hypervitaminosis D
Hypervitaminosis D is a condition that occurs after taking very high doses of vitamin D.
Vitamin D toxicity
The cause is excess intake of vitamin D. The doses need to be very high, far above what most health care providers normally prescribe.
There has been a lot of confusion about vitamin D supplementation. The recommended daily allowance (RDA) for vitamin D is 400 to 800 IU/day, according to age and pregnancy status. Higher doses may be needed for some people, such as those with vitamin D deficiency, hypoparathyroidism, and other conditions. However, most people do not need more than 2,000 IU of vitamin D a day. The doable upper level for vitamin D ranges from 25 to 100 mcg (1,000 to 4,000 IU), depending on age. Ask your provider what dose is best for you.
For most people, symptoms of vitamin D toxicity only occurs with vitamin D doses above 10,000 IU per day.
An excess of vitamin D can cause an abnormally high level of calcium in the blood (hypercalcemia). This can severely damage the kidneys, soft tissues, and bones over time.
The symptoms include:
- Constipation
- Decreased appetite (anorexia)
- Dehydration
- Fatigue and confusion
- Frequent urination
- Irritability
- Muscle weakness
- Vomiting
- Excessive thirst (polydipsia)
- High blood pressure
- Passing large amounts of urine (polyuria)
Your provider will likely tell you to stop taking vitamin D. In severe cases, other treatment may be needed.
Germantown Health Center
Amy Miller is a primary care provider, practicing in Family Medicine in Germantown, Wisconsin. Dr. Miller is rated as an Advanced provider by MediFind in the treatment of Hypervitaminosis D. She is also highly rated in 54 other conditions, according to our data. Her clinical expertise encompasses Familial Hypertension, Glucocorticoid-Remediable Aldosteronism, Hypertension, and High Cholesterol. Dr. Miller is board certified in Family Medicine. Dr. Miller is currently accepting new patients.
Franciscan Medical Clinic - Bonney Lake
Corie Sandall is a primary care provider, practicing in Internal Medicine in Bonney Lake, Washington. Dr. Sandall is rated as an Experienced provider by MediFind in the treatment of Hypervitaminosis D. She is also highly rated in 18 other conditions, according to our data. Her clinical expertise encompasses Type 2 Diabetes (T2D), High Cholesterol, Hypertension, and Glucocorticoid-Remediable Aldosteronism. Dr. Sandall is board certified in American Board Of Internal Medicine. Dr. Sandall is currently accepting new patients.
Texas Health Family Care
Cynthia Shughrue is a primary care provider, practicing in Family Medicine in Dallas, Texas. Dr. Shughrue is rated as an Experienced provider by MediFind in the treatment of Hypervitaminosis D. She is also highly rated in 6 other conditions, according to our data. Her clinical expertise encompasses Familial Combined Hyperlipidemia, Xanthoma, Cirrhosis, and High Cholesterol. Dr. Shughrue is currently accepting new patients.
Recovery is expected, but permanent kidney damage can occur.
Health problems that can result from taking too much vitamin D over a long time include:
- Dehydration
- Hypercalcemia
- Kidney damage
- Kidney stones
Contact your provider if:
- You or your child shows symptoms of hypervitaminosis D and has been taking more vitamin D than the RDA
- You or your child shows symptoms and has been taking a prescription or over-the-counter form of vitamin D
To prevent this condition, pay careful attention to the correct vitamin D dose. Use vitamin D supplements from reliable licensed sources.
Many combination vitamin supplements contain vitamin D, so check the labels of all the supplements you are taking for vitamin D content.
Published Date: October 19, 2025
Published By: Sandeep K. Dhaliwal, MD, board-certified in Diabetes, Endocrinology, and Metabolism, Springfield, VA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
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Greenbaum LA. Vitamin D deficiency (rickets) and excess. In: Kliegman RM, St. Geme JW, Blum NJ, et al, eds. Nelson Textbook of Pediatrics. 22nd ed. Philadelphia, PA: Elsevier; 2025:chap 69.
Mason JB, Booth SL. Vitamins, trace minerals, and other micronutrients. In: Goldman L, Cooney KA, eds. Goldman-Cecil Medicine. 27th ed. Philadelphia, PA: Elsevier; 2024:chap 199.
National Institutes of Health Office of Dietary Supplements website. Vitamin D fact sheet for health professionals. ods.od.nih.gov/factsheets/VitaminD-HealthProfessional/. Updated June 27, 2025. Accessed November 3, 2025.