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Matti Narkia

Vitamin D - Dr. Weil - 0 views

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    "Vitamin D, often referred to as the "sunshine vitamin," is actually a fat-soluble hormone that the body can synthesize naturally. There are several forms, including two that are important to humans: D2 and D3. Vitamin D2 (ergocalciferol) is synthesized by plants, and vitamin D3 (cholecalciferol) is synthesized by humans when skin is exposed to ultraviolet-B (UVB) rays from sunlight. The active form of the vitamin is calcitriol, synthesized from either D2 or D3 in the kidneys. Vitamin D helps to maintain normal blood levels of calcium and phosphorus"
Matti Narkia

Hypovitaminosis D - Wikipedia, the free encyclopedia - 0 views

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    "Hypovitaminosis D is a deficiency of Vitamin D. It can result from: inadequate intake coupled with inadequate sunlight exposure (in particular sunlight with adequate ultra violet B rays), disorders that limit its absorption, conditions that impair conversion of vitamin D into active metabolites, such as liver or kidney disorders, or, rarely, by a number of hereditary disorders.[1] Deficiency results in impaired bone mineralization, and leads to bone softening diseases, rickets in children and osteomalacia in adults, and contributes to osteoporosis.[1] Osteomalacia may also occur rarely as a side-effect of phenytoin use

    Hypovitaminosis D is typically diagnosed by measuring the concentration in blood of the compound 25-hydroxyvitamin D (calcidiol), which is a precursor to the active form 1,25-dihydroxyvitamin D (calcitriol).[6] One recent review has proposed the following four categories for hypovitaminosis D:[7]

    * Insufficient 50-100 nmol/L (20-40 ng/mL)
    * Mild 25-50 nmol/L (10-20 ng/mL)
    * Moderate 12.5-25.0 nmol/L (5-10 ng/mL)
    * Severe < 12.5 nmol/L (< 5 ng/mL)

    Note that 1.0 nmol/L = 0.4 ng/mL for this compound.[8] Other authors have suggested that a 25-hydroxyvitamin D level of 75-80 nmol/L (30-32 ng/mL) may be sufficient
Matti Narkia

Hypervitaminosis D - Wikipedia, the free encyclopedia - 0 views

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    "Hypervitaminosis D is a state of vitamin D toxicity.

    The recommended daily allowance is 400 IU per day. Overdose has been observed at 1925 µg/d (77,000 IU per day). Acute overdose requires between 15,000 µg/d (600,000 IU per day) and 42,000 µg/d (1,680,000 IU per day) over a period of several days to months, with a safe intake level being 250 µg/d (10,000 IU per day).[1] Foods contain low levels, and have not been known to cause overdose. Overdose has occurred due to industrial accidents, for example when incorrectly formulated pills were sold or missing industrial concentrate cans misused as cans of milk.

    Vitamin D toxicity is unlikely except when certain medical conditions are present, such as primary hyperparathyroidism, sarcoidosis, tuberculosis, and lymphoma."
Matti Narkia

Multiple Sclerosis and You - Multiple Sclerosis (MS) Symptoms, Diagnosis and Treatments... - 0 views

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    Multiple Sclerosis Blog
    By Julie Stachowiak, Ph.D.,
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