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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. Evaluation of serum 25-hydroxy vitamin D levels in alopecia areata of scalp: a cross sectional observational study International Journal of Research in Dermatology · 2021
    2. Serum 25-Hydroxy-Vitamin D and Vitamin B12 Levels in Childhood Alopesia Areata İzmir Dr.Behçet Uz çocuk hastanesi dergisi · 2021
    3. Telogen effluvium and associated incidence of abnormal serum ferritin, zinc, 25-hydroxy vitamin D, and thyroid-stimulating hormone Journal of The American Academy of Dermatology · 2014
    4. 25 Hydroxyvitamin D 1 α-Hydroxylase Is Required for Optimal Epidermal Differentiation and Permeability Barrier Homeostasis 2004 · 140 citations
    5. 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
    6. Reduced level of 25-hydroxyvitamin D in chronic/relapsing Alopecia Areata Dermato-endocrinology · 2013 · 40 citations
    7. 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
    8. The association between serum ferritin and 25-hydroxyvitamin D and metabolic syndrome in Korean women: the Korea National Health and Nutrition Examination Survey 2010–2012 Journal of Clinical Biochemistry and Nutrition · 2017 · 7 citations
    9. Trichotillomania associated with a 25-hydroxy vitamin D deficiency: A case report The mental health clinician · 2020 · 5 citations
    10. Evaluation of 25-HydroxyVitamin D Levels in Patients with Chronic Telogen Effluvium: A Retrospective Analysis of 291 Cases Turkiye Klinikleri Journal of Dermatology · 2020
    11. Gender difference in relationship between serum ferritin and 25-hydroxyvitamin D in Korean adults PLOS ONE · 2017 · 10 citations
    12. Serum 25 hydroxyvitamin D levels in alopecia areata, female pattern hair loss, and male androgenetic alopecia in a Chinese population Journal of Cosmetic Dermatology · 2020 · 4 citations
    13. Serum 25 hydroxy vitamin D level in patients with telogen effluvium Egyptian Journal of Medical Research · 2025
    14. Deficient and/or insufficient serum 25 hydroxy vitamin D in patients with alopecia areata: is it a fact or a fiction? 2019
    15. Extrarenal Expression of 25-Hydroxyvitamin D<sub>3</sub>-1α-Hydroxylase<sup>1</sup> The Journal of Clinical Endocrinology & Metabolism · 2001 · 845 citations
    16. Possible association of female-pattern hair loss with alteration in serum 25-hydroxyvitamin D levels Egyptian Journal of Dermatology and Venereology · 2014 · 11 citations
    17. Serum 25-Hydroxy Vitamin D Level in Patients with Alopecia Areata and Its Relationship with Severity of the Disease Journal of Dhaka Medical College · 2025
    18. Possible Association of Female-Pattern Hair Loss with Alteration in Serum 25-Hydroxyvitamin D Levels Pakistan Journal of Medical and Health Sciences · 2023
    19. Serum 25 hydroxyvitamin D in non‐scarring alopecia: A systematic review and meta‐analysis Journal of Cosmetic Dermatology · 2023
    20. Serum 25-hydroxy vitamin D3 level in Egyptian patients with alopecia areata 2013 · 14 citations
    21. Determination of serum 25-hydroxyvitamin D levels in patients with alopecia areata and their comparison with levels in healthy controls: A cross-sectional study 2021 · 2 citations
    22. Relationship between Serum 25-Hydroxyvitamin D Levels and Hormonal Status in Infertile Women: A Retrospective Study Diagnostics · 2023
    23. A study to assess the relationship between female pattern hair loss and levels of serum 25 Hydroxyvitamin D and ferritin International journal of dermatology, venereology and leprosy sciences · 2023
    24. Reduced Levels of Serum 25-Hydroxyvitamin D in Alopecia Areata: A Systematic Review and Meta-analysis 2019 · 2 citations
    25. Assessment of serum 25-hydroxyvitamin D levels in patients with extensive/recalcitrant alopecia areata before and after PUVA and NB-UVB therapy Journal of the Egyptian Womenʼs Dermatologic Society · 2015 · 3 citations
    26. Rickets with alopecia-remission following a course of 1-?-hydroxy vitamin D3 therapy European journal of pediatrics · 1989 · 6 citations
    27. Serum level of vitamin D in patients with alopecia areata Egyptian Journal of Basic and Applied Sciences · 2016 · 13 citations
    28. Study of vitamin D deficiency in patients with alopecia areata attending a dermatology center in Iran International Journal of Dermatology · 2021 · 1 citations
    29. Evaluation of Vitamin D Levels in Chronic Telogen Effluvium Patients Turkiye Klinikleri Journal of Dermatology · 2018 · 1 citations
    30. Rickets with Alopecia Signals Vitamin D Dependent Rickets Type II Journal of Nepal Paediatric Society · 2016 · 1 citations