For most adults, the tolerable upper intake level is **4,000 IU (100 micrograms) per day** from all sources unless a healthcare professional recommends a higher dose for a specific reason. ([ODs][2])
That does not mean 4,001 IU is automatically toxic. Toxicity usually happens with much higher intake or inappropriate long-term supplementation.
Doctors sometimes prescribe doses above the usual upper limit temporarily to treat deficiency, but that is typically done with monitoring.
## Can You Get Vitamin D Toxicity From the Sun?
No, not under normal circumstances.
Your skin regulates how much vitamin D it makes from sunlight, so excessive sun exposure does not usually cause vitamin D toxicity. ([Mayo Clinic][1])
The problem is almost always **too much vitamin D from supplements**, especially high-dose products taken repeatedly.
## Should You Stop Vitamin D Immediately if You Have These Symptoms?
Not automatically.
The original viral-style headline is too strong.
If you are taking vitamin D and develop symptoms that could fit toxicity, the safest response is to:
* Check the dose you are taking
* Avoid increasing it
* Contact a healthcare professional
* Ask whether blood tests for vitamin D and calcium are appropriate
If your doctor prescribed vitamin D, do not stop it solely because of an online article unless you are advised to do so.
## Who Should Be Extra Careful?
Extra caution may be needed if you:
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