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2. Vitamin D deficiency - Wikipedia

   en.wikipedia.org/wiki/Vitamin_D_deficiency

   Sunscreen can also reduce vitamin D production. [3] Medications may speed up the metabolism of vitamin D, causing a deficiency. [3] The liver is required to transform vitamin D into 25-hydroxyvitamin D. This is an inactive metabolite of vitamin D but is a necessary precursor (building block) to create the active form of vitamin D. [1]

3. Vitamin D and neurology - Wikipedia

   en.wikipedia.org/wiki/Vitamin_D_and_neurology

   A vitamin D blood-concentration standard for diagnosing hypovitaminosis D does not exist. In the past, hypovitaminosis D was defined by blood concentrations lower than 20 ng/mL. [ 6 ] However, in more recent literature many researchers have considered 30 ng/mL to be an insufficient concentration of vitamin D. [ 6 ] Subnormal levels of vitamin D ...

4. Vitamin D - Wikipedia

   en.wikipedia.org/wiki/Vitamin_D

   Vegans had lower dietary intake of vitamin D and lower serum 25(OH)D when compared to omnivores, with lacto-ovo-vegetarians falling in between due to the vitamin content of egg yolks and fortified dairy products. [38] Governments have mandated or voluntary food fortification programs to bridge the difference in, respectively, 15 and 10 ...

5. The Benefits of Vitamin D for Your Health and Performance - AOL

   www.aol.com/lifestyle/benefits-vitamin-d-health...

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6. This is the reason you feel tired all of the time - AOL

   www.aol.com/news/reason-feel-tired-time...

   “There are numerous causes of tiredness including poor sleep, dehydration and stress, especially around Christmas time, as well as medical causes.” Feeling tired all the time is referred to as ...

7. Vitamin D Could Reduce Your Dementia Risk, New Study Says - AOL

   www.aol.com/vitamin-d-could-reduce-dementia...

   Vitamin D offers a range of benefits, including support bone health and mood. But recent research now says it could also reduce risk of dementia. Vitamin D Could Reduce Your Dementia Risk, New ...