July 2023 in “Media Dermato Venereologica Indonesiana” In this study, researchers highlighted that in sarcoidosis, macrophages in granulomas can produce vitamin D, potentially leading to calcium imbalances, where vitamin D supplementation may cause hypercalcemia, necessitating careful laboratory assessment before supplementation.
March 2019 in “Evidence Based Women Health Journal (Online)” This study found that vitamin D supplementation increased the cumulative ovulation rate in vitamin D deficient women with polycystic ovary syndrome compared to those with normal vitamin D levels and a control group.
July 2025 in “Food Science & Nutrition” This study found that vitamin D supplementation in diets of Rex rabbits improved hair follicle development and fatty acid metabolism, with 1400–2100 IU/kg proving most effective for hair density and 2800 IU/kg increasing hair length.
January 2025 in “Clinical Pediatric Endocrinology” In a case study of vitamin D-dependent rickets type 2A, researchers observed that while active vitamin D treatment failed to improve bone and laboratory abnormalities, oral calcium lactate significantly ameliorated these issues, although skin and hair problems remained unresponsive.
This study observed that women with PCOS have a higher likelihood of vitamin D deficiency, particularly if they are obese, compared to women without PCOS.
September 2025 in “Clinics and Practice” This study found that six-month supplementation with fish-derived collagen peptides, calcium, and vitamin D3 improved skin hydration and elasticity and reduced hair loss in menopausal women, with collagen playing a dominant role in enhancing skin elasticity.
April 2025 in “Journal of Controversies in Obstetrics & Gynecology and Pediatrics” This study found that vitamin D supplementation significantly improved clinical pregnancy rates in women with polycystic ovary syndrome treated at a Turkish infertility clinic, though it did not affect live birth or miscarriage rates.
April 2024 in “The Egyptian Family Medicine Journal/The Egyptian Family Medicine Journal ” This randomized controlled trial found that vitamin D supplementation significantly improved various post-COVID-19 symptoms, such as fatigue and sleep disturbances, compared to placebo over two months, emphasizing the role of vitamin D deficiency in persistent symptoms among post-COVID-19 patients.
October 2023 in “RECIMA21 - Revista Científica Multidisciplinar - ISSN 2675-6218” This article discusses how vitamin D supplementation impacts human aesthetics and health, with effects varying positively or negatively based on different dermatological conditions.
September 2022 in “Al-Azhar University Journal of Virus Researches and Studies” This study found that vitamin D supplementation significantly improved ovulation rates in PCOS patients undergoing treatment with clomiphene citrate.
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January 2021 in “Journal of Dermatology and Dermatologic Surgery” This study found that taking Vitamin D supplements may be associated with a higher risk of hyperpigmentation after laser hair removal.
This study reports that their population showed significant prevalence of vitamin D deficiency, but the impact of supplementation on pregnancy rates remains unclear and requires more research.
October 2008 in “Trace Elements and Electrolytes” In this study, perimenopausal women with initially high hair concentrations of calcium, magnesium, and silicon experienced a decrease in these elements after intermittent dietary supplementation with calcium, magnesium, silicon, and vitamin D.
The authors of this study concluded that higher calcium levels in hair may indicate early metabolic changes leading to osteopenia or osteoporosis in menopausal women, even before detectable by standard DEXA imaging.
This study found that calcium, magnesium, and vitamin D supplementation altered hair calcium and magnesium content in perimenopausal women, suggesting an early indicator of metabolic changes linked to skeletal mineralization.
July 2025 in “Insights-Journal of Health and Rehabilitation” This study found that adding vitamin D supplementation to metformin therapy led to a greater reduction in HbA1c levels compared to metformin alone in patients with type 2 diabetes, suggesting an enhanced improvement in glycemic control.
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April 2017 in “Journal of cosmetic dermatology” This study found that while vitamin D deficiency is not the sole cause of alopecia areata, it may worsen the disease, suggesting supplementation could help in pediatric cases.
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April 2019 in “Actas Dermo-Sifiliográficas” This review discusses the relationship between vitamin D and various skin diseases, highlighting recent findings on its role and the importance of assessing and correcting vitamin D levels, but reports no new clinical results.
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January 2019 in “International journal of medicine in developing countries” 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.
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June 2022 in “Al-Esraa University College journal for medical sciences.” 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.
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December 2021 in “Asian journal of medicine and health” 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.
March 2025 in “Yemeni Journal For Medical Sciences” This study found that 89.3% of female college students in Aden, Yemen, had hypovitaminosis D, with sunscreen use and lack of vitamin D supplements significantly associated with this condition.
December 2021 in “Journal of pharmaceutical research international” This study found that among adult females in Saudi Arabia, two-thirds recognized a link between vitamin D deficiency and hair loss, but the overall knowledge and supplement use were moderate.
October 2024 in “Frontiers in Nutrition” This study found that patients with alopecia, particularly alopecia areata and female pattern hair loss, often have vitamin D deficiency, suggesting that screening for vitamin D could benefit these patients.
32 citations
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December 2017 in “International Journal of Molecular Sciences” This review suggests that decreased serum 25-hydroxyvitamin D levels may play a role in different types of non-scarring alopecia, but further studies are needed to explore vitamin D supplementation as a therapeutic option.
2 citations
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June 2018 in “Sudan journal of medical sciences” 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.
June 2024 in “jurnal ABDIMAS Indonesia” This study emphasizes the importance of educating the elderly on vitamin D's role in hair health, recommending dietary and lifestyle interventions, including vitamin D supplementation, to address hair quality issues such as loss and brittleness.
February 2022 in “Global academic journal of medical sciences” This study observed lower vitamin D levels in alopecia areata patients compared to healthy controls and suggested a possible causal role of vitamin D deficiency in the condition.
January 2022 in “Indian journal of dermatopathology and diagnostic dermatology” This study observed that low serum ferritin and vitamin D levels may contribute to diffuse hair loss in women.
37 citations
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June 2018 in “Clinical and Experimental Medicine” This study found that patients with alopecia areata had significant systemic inflammation and vitamin D deficiency, with both conditions more pronounced as disease severity increased.