Vitamin D is an essential nutrient, but taking too much can result in adverse effects such as diarrhea, constipation and the stomach cramps that can accompany these. Most often, an overdose occurs when you take too many vitamin supplements rather than consume too many foods rich in the vitamin. Talk to your doctor about the amount of vitamin D you should be taking, and let her know if you experience stomach cramps.
RDA and Upper Limits
It is important to get the recommended daily allowance, or RDA, of vitamin D, which is 600 IU for adults under 70 and 800 IU for those over 70, according to the Institute of Medicine, as stated by MayoClinic.com. This amount will keep your bones and immune system strong, and it will also help prevent you from developing osteoporosis. However, since getting too much vitamin D can cause health problems such as stomach cramps, the tolerable upper limit has been set at 2,000 IU, according to the University of Maryland Medical Center. Do not consume more than this in a day without first consulting a doctor.
Symptoms of Vitamin D Toxicity
Along with stomach cramps, diarrhea, constipation and vomiting, you can develop other side effects from a vitamin D toxicity, or hypervitaminosis D. These include extreme thirst, a metallic taste in your mouth, weight loss, bone pain, exhaustion, itchy skin and muscle problems. Too much vitamin D can also lead to a buildup of calcium in your blood, which may cause vomiting, constipation and stomach cramps. It can also cause confusion, an abnormal heart rhythm and kidney stones. See your doctor if you experience these or other symptoms.
Other Causes of Stomach Cramps
Though unpleasant, occasional stomach cramps are common and may not be a symptom of a vitamin D toxicity. They can be the result of normal digestive activity or an illness such as viral gastroenteritis. However, cramps can also be the sign of a medical condition such as appendicitis, diverticulitis, food allergies, kidney stones or a urinary tract infection. See your doctor if your stomach pain lasts longer than a week, does not improve within two days or is accompanied by vomiting or diarrhea. If the pain is sudden and sharp or if you are having trouble breathing, seek immediate medical attention.
Additional Considerations
Treatment for a vitamin D toxicity typically involves stopping the consumption of supplements, as well as hospitalization, if necessary. If you experience any of the aforementioned side effects while taking vitamin D supplements, call your doctor and discuss lowering your dosage. You might also try getting your vitamin D through foods such as fortified milk, salmon, sardines or eggs. Discuss dietary changes with your physician as well.
