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  1. Vitamin D Deficiency (National Library of Medicine)  
    What is vitamin D deficiency? Vitamin D deficiency means that your body is not getting enough vitamin D to stay healthy. Why do I need vitamin D and how ...
    https://medlineplus.gov/vitaminddeficiency.html - Health Topics
  2. Vitamin D (National Library of Medicine)  
    ... body needs to grow and develop normally. Vitamin D helps your body absorb calcium. Calcium is one ... building blocks of bone. A lack of vitamin D can lead to bone diseases such as osteoporosis ...
    https://medlineplus.gov/vitamind.html - Health Topics
  3. D-Dimer Test: MedlinePlus Medical Test 
    D-Dimer Test What is a D-dimer test? A D-dimer test looks for D-dimer in blood. D-dimer is a protein fragment (small piece) that's made ... brain is blocked. Why do I need a D-dimer test? You may need this test if ...
    https://medlineplus.gov/lab-tests/d-dimer-test - Medical Tests
  4. Vitamin D Test: MedlinePlus Medical Test 
    Vitamin D Test What is a Vitamin D Test? A vitamin D test measures the level of vitamin D in your blood to make sure you have enough for your body ... be tested. Why do I need a vitamin D test? Your provider may order a vitamin D ...
    https://medlineplus.gov/lab-tests/vitamin-d-test - Medical Tests
  5. D-dimer test 
    D-dimer tests are used to check for blood clotting problems. Blood clots can cause health problems, ... The D-dimer test is a blood test. You will need to get a blood sample drawn .
    https://medlineplus.gov/ency/article/007620.htm - Medical Encyclopedia
  6. Vitamin D-dependent rickets 
    Vitamin D-dependent rickets is a disorder of bone development that leads to softening and weakening of the bones (rickets). There are several forms of the condition ...
    https://medlineplus.gov/.../condition/vitamin-d-dependent-rickets - Genetics
  7. D-bifunctional protein deficiency 
    D-bifunctional protein deficiency is a disorder that causes deterioration of nervous system functions (neurodegeneration) beginning in infancy. Newborns with D-bifunctional protein deficiency have weak muscle tone (hypotonia) ...
    https://medlineplus.gov/.../d-bifunctional-protein-deficiency - Genetics
  8. Hypervitaminosis D 
    Hypervitaminosis D is a condition that occurs after taking very high doses of vitamin D . ... 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 ...
    https://medlineplus.gov/ency/article/001594.htm - Medical Encyclopedia
  9. 25-hydroxy vitamin D test 
    The 25-hydroxy vitamin D test is the most accurate way to measure how much vitamin D is in your body. Vitamin D helps control calcium and phosphate levels in the ...
    https://medlineplus.gov/ency/article/003569.htm - Medical Encyclopedia
  10. Vitamin D From the National Institutes of Health (National Institutes of Health, Office of Dietary Supplements)  
    ... Fact Sheets > Vitamin D > Vitamin D - Consumer Vitamin D Fact Sheet for Consumers Have a question? Ask ... the Time of COVID-19 . What is vitamin D and what does it do? Vitamin D is ...
    https://ods.od.nih.gov/factsheets/VitaminD-Consumer - Drugs and Supplements
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