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  1. Vitamin D deficiency: Can it cause high blood pressure? - Mayo Clinic

    Do not take more than 4,000 IU a day. If you're worried about your vitamin D level, talk with your healthcare team. A blood test can be done to check your ...

  2. Vitamin D - Mayo Clinic

    If you think you don't get enough vitamin D, talk with your healthcare professional. A simple blood test can check the levels of this vitamin in your blood.

  3. Vitamin D Toxicity Rare in People Who Take Supplements, Mayo Clinic Study Finds

    Vitamin D levels are determined by a blood test called a serum 25-hydroxyvitamin D blood test. A normal level is 20-50 ng/mL, and deficiency is considered ...

  4. Vitamin D toxicity: What if you get too much? - Mayo Clinic

    Vitamin D toxicity usually is caused by taking large doses of vitamin D supplements. You're not likely to get this condition from eating the few foods that ...

  5. Vitamin D deficiency - Mayo Clinic

    Tests & Procedures · Drugs & Supplements · Healthy ... Not getting enough vitamin D, also called a vitamin D ... Price Transparency · Medical Professionals.

  6. Can vitamin D protect against coronavirus disease 2019 (COVID-19)? - Mayo Clinic

    Vitamin D, like other vitamins and minerals, helps the body work. ... Others test the effect of vitamin D given to ... Price Transparency · Medical Professionals.

  7. Vitamin D and MS: Is there any connection? - Mayo Clinic

    While vitamin D supplements appear to be safe for people with MS, high doses can lead to changes in calcium levels. MS develops when the immune system attacks ...

  8. Mayo Clinic Minute: Do you need more vitamin D in the winter?

    Vitamin D is a nutrient your body needs to keep your bones healthy and strong. It also has properties that support your immune system and neuromuscular ...

  9. Is there a connection between vitamin D deficiency and COVID-19? - Mayo Clinic News Network

    ... test positive for the virus that causes COVID-19 than people who had normal levels of vitamin D. Other research has observed high rates of vitamin D ...

  10. Examining the prevalence of low vitamin D levels in patients with gastroparesis and its relationship to symptoms - Mayo Clinic

    ... vitamin D levels, symptoms, gastric emptying rates and gastric myoelectrical activity (GMA) in response to the water load satiety test (WLST). The results ...