You should ask a health care professional for information on how much vitamin D you should take, as it may be different depending on your age and what you are using it for.
Vitamin D is generally well tolerated when taken in recommended doses. High doses of vitamin D over a long period of time can cause weakness, loss of appetite, weight loss, increased urination, irregular heart rhythms, dry mouth, drowsiness, headache, nausea, vomiting, and fatigue. Chronic vitamin D overload can increase blood calcium levels, which can subsequently harden the arteries and damage organs such as the heart and kidneys.
Medications that can interact with vitamin D supplements include:
Consult your health care provider if you have concerns.
Women who are pregnant or breast-feeding can safely take oral vitamin D supplements in recommended amounts (with a maximum of 4000 IU/day). Higher doses might harm the infant. It is safe for infants who are breast-fed to be given vitamin D supplements provided the total amount of vitamin D (from all sources) does not exceed the recommended dose.
Before taking any new medications, including natural health products, speak to your physician, pharmacist, or other health care provider. Tell your health care provider about any natural health products you may be taking.