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This study reported that a Pakistani urban population is largely vitamin D deficient, with the majority of those having severe deficiency exhibiting symptoms such as generalized body weakness and depression/anxiety.

This study observed wide clinical diversity among five patients with the same VDR gene mutation causing vitamin D-dependent rickets type II, suggesting involvement of a nuclear accessory factor and a nongenomic action of the vitamin.

CCCA in African Americans may be linked to hair grooming, low vitamin D, and autoimmune factors.

This literature review highlights the effectiveness of topical vitamin D (e.g., calcipotriol, calcitriol) in treating vitiligo, emphasizing its role in melanogenesis and as an immunomodulator, either alone or combined with topical corticosteroids, offering minimal side effects.

This study confirmed that 25(OH)D3 can be detected in hair samples from healthy young adults, but no correlation was found between hair and serum 25(OH)D3 concentrations, indicating limited potential as a standalone biomarker.

This review discusses the potential link between low serum vitamin D levels and androgenetic alopecia and reports that vitamin D might be useful for diagnosis and treatment, but no new clinical results are included.

In this study, serum 25-hydroxyvitamin D levels were similar between alopecia areata patients and healthy controls, though a non-significant trend toward higher vitamin D deficiency was observed among the patients.

This review discusses the involvement of vitamin D and its receptor in hair health, focusing on different types of alopecia, but reports no new clinical results; evidence remains inconsistent.

This study observed that patients with alopecia areata had significantly lower serum 25-hydroxyvitamin D levels than healthy controls, with a trend toward even lower levels in more severe cases.

This study found that the adult population in Majmaah, Saudi Arabia, has limited knowledge and practice regarding vitamin D deficiency, despite widespread awareness from media sources.

This study found that individuals with androgenic alopecia had higher levels of vitamin D compared to those with telogen effluvium and healthy controls.

This paper presents a case where vitamin D replacement therapy was associated with hair regrowth in a patient with nonscarring alopecia linked solely to vitamin D deficiency and discusses managing vitamin D deficiency more broadly.

In this case study, a 45-year-old woman's hair loss improved after three months of weekly high-dose vitamin D supplementation, emphasizing the importance of assessing vitamin D levels in patients with hair loss.

This meta-regression analysis observed a slightly negative but nonsignificant correlation between vitamin D levels and the severity of alopecia areata, suggesting a complex relationship that requires further investigation.

This study among ethnic Saudi Arabian women concluded that symptoms like muscle cramps, fatigue, mood swings, hair loss, back pain, and weight gain were more common in those with lower vitamin D levels.

This study found that 2MbisP increases epidermal thickening more rapidly than atRA in rhino mice, while both compounds similarly reduce utricle size.

In this case report, researchers described a two-year-old girl with Vitamin D dependent rickets Type II, noting elevated 1,25-dihydroxyvitamin D3 and alopecia, and observed limited treatment response likely due to poor compliance.

In this study, 1,25-dihydroxyvitamin D3 inhibited growth and promoted differentiation in normal hair follicle cells but did not affect cells from a patient with vitamin D-dependent rickets type II, assisting in potential rapid diagnosis of the condition.

In this study, researchers observed that dietary vitamin D intake and light exposure play a crucial role in vitamin D metabolism in mice, suggesting similar importance for human health in maintaining optimal vitamin D levels.

In this retrospective study of eight Saudi children with hereditary vitamin D resistant rickets, researchers observed that adjunctive cinacalcet appeared safe and showed initial promise in improving serum PTH levels, though further investigation is needed to confirm its efficacy.

This study found that women with polycystic ovary syndrome had deficient or suboptimal serum vitamin D levels, but the effects of vitamin D on metabolic syndrome and hormonal balance remain unclear.

This study found that deleting the vitamin D receptor from specific stem cells in mouse hair follicles disrupts their ability to regenerate the epidermis after injury, suggesting an essential interaction with the transcription factor p63.

This study found that patients with seborrheic dermatitis were more likely to have severe vitamin D deficiency compared to healthy controls.

This study found that supplementing cholecalciferol with L-thyroxine significantly reduced depression levels in hypothyroid patients with autoimmune thyroiditis compared to L-thyroxine alone.

This study found that while participants in Jeddah, Saudi Arabia, had good knowledge about Vitamin D and recognized sunlight as a key source, there was inconsistency in their attitudes towards maintaining adequate Vitamin D levels.

This study found that vitamin D supplementation in vitamin D-deficient patients in Baghdad alleviated symptoms like hair loss, bone pain, and depression, with improvements noted within two months.

This study reported a significant association between cultural dress practices, reduced sunlight exposure, and symptoms of vitamin D and calcium deficiency among Muslim women in Coimbatore.

This study found that combining oral vitamin D with topical minoxidil improved female pattern hair loss more effectively than either treatment alone.

This study reported that two-thirds of adult females in Saudi Arabia recognized the link between vitamin D deficiency and hair loss, but overall knowledge was average, indicating a need for increased awareness and vitamin D supplementation.

This study observed that women with telogen effluvium had significantly lower vitamin D levels compared to control subjects, suggesting a possible link between vitamin D deficiency and this type of hair loss.