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    Did you mean 25-Hydroxyvitamin D?
    Glossary 25-Hydroxyvitamin D

    form of vitamin D measured in blood to assess status

    25-Hydroxyvitamin D, also known as 25(OH)D or Calcifediol, is a form of vitamin D that is measured in the blood to assess a person's vitamin D status. It is produced in the liver from vitamin D3 (cholecalciferol) and is a crucial indicator because it reflects the total amount of vitamin D from both dietary intake and sunlight exposure.

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    1. Vitamin D-dependent rickets type II. Defective induction of 25-hydroxyvitamin D3-24-hydroxylase by 1,25-dihydroxyvitamin D3 in cultured skin fibroblasts. Journal of Clinical Investigation · 1985 · 81 citations
    2. Possible association of female-pattern hair loss with alteration in serum 25-hydroxyvitamin D levels Egyptian Journal of Dermatology and Venereology · 2014 · 11 citations
    3. Serum 25-hydroxy vitamin D3 level in Egyptian patients with alopecia areata 2013 · 14 citations
    4. Extrarenal Expression of 25-Hydroxyvitamin D<sub>3</sub>-1α-Hydroxylase<sup>1</sup> The Journal of Clinical Endocrinology & Metabolism · 2001 · 845 citations
    5. Enhancing 1α-Hydroxylase Activity with the 25-Hydroxyvitamin D-1α-Hydroxylase Gene in Cultured Human Keratinocytes and Mouse Skin Journal of Investigative Dermatology · 2001 · 18 citations
    6. Trichotillomania associated with a 25-hydroxy vitamin D deficiency: A case report The mental health clinician · 2020 · 5 citations
    7. Rickets with alopecia-remission following a course of 1-?-hydroxy vitamin D3 therapy European journal of pediatrics · 1989 · 6 citations
    8. Generation of Genetically Modified Rats Using CRISPR/Cas9 Genome-Editing System to Reveal Novel Vitamin D Actions Medical Research Archives · 2021
    9. Vitamin D and the skin: Focus on a complex relationship: A review Journal of Advanced Research · 2014 · 139 citations
    10. Segmental analysis of human hair reveals intra-annual variation in 25(OH)D3 concentrations in modern and archaeological individuals Scientific Reports · 2025
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    Community 1 of 744

    1. which vitamin D test should one take before starting hair treatment ? Reddit · 7 Aug 2020
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