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  2. Are your vitamin D levels low? An expert shares some symptoms ...

    www.aol.com/lifestyle/vitamin-d-levels-low...

    Low levels of vitamin D have also been linked to depression, with studies finding that supplementing vitamin D helped reduce depressive symptoms in adults with depression. However, supplementation ...

  3. Vitamin D toxicity - Wikipedia

    en.wikipedia.org/wiki/Vitamin_D_toxicity

    The normal range for blood concentration of 25-hydroxyvitamin D in adults is 20 to 50 nanograms per milliliter (ng/mL). Blood levels necessary to cause adverse effects in adults are thought to be greater than about 150 ng/mL, leading the Endocrine Society to suggest an upper limit for safety of 100 ng/mL. [1]

  4. Vitamin D may not prevent fractures or falls in older adults ...

    www.aol.com/vitamin-d-may-not-prevent-102300100.html

    A lack of exposure to sunlight, the natural process of aging, and high levels of body fat can all contribute to vitamin D deficiency, which can lead to osteoporosis, bone and joint pain, and ...

  5. Scientists Reveal New Findings About Older Adults Who Take ...

    www.aol.com/lifestyle/scientists-reveal-findings...

    Older adults need about 600 to 800 IU of vitamin D daily, depending on their age. ... too much can put you at serious risk for toxicity including adverse side effects like kidney stones and high ...

  6. Hypervitaminosis - Wikipedia

    en.wikipedia.org/wiki/Hypervitaminosis

    Hypervitaminosis is a condition of abnormally high storage levels of vitamins, which can lead to various symptoms as over excitement, irritability, or even toxicity. Specific medical names of the different conditions are derived from the given vitamin involved: an excess of vitamin A , for example, is called hypervitaminosis A .

  7. Vitamin D - Wikipedia

    en.wikipedia.org/wiki/Vitamin_D

    Unlike the other twelve vitamins, vitamin D is only conditionally essential - in a preindustrial society people had adequate exposure to sunlight and the vitamin was a hormone, as the primary natural source of vitamin D was the synthesis of cholecalciferol in the lower layers of the skin's epidermis, triggered by a photochemical reaction with ...