January 2024 in “Journal of advanced research in Medical and Health science” This study observed that vitamin D deficiency in alopecia areata correlates inversely with disease severity and duration, but does not correlate with serum vitamin D levels.
March 2023 in “Pakistan Journal of Medical & Health Sciences” This study found that alopecia areata patients often had low vitamin D levels, and topical calcipotriol treatment significantly reduced the severity of their hair loss.
October 2023 in “Journal of Pakistan Association of Dermatologists” This randomized control trial reported that patients with alopecia areata typically have lower serum Vitamin D levels, and treatment with topical vitamin D3 analogue calcipotriol led to significant hair regrowth in 71% of participants over six months.
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October 1987 in “British journal of dermatology/British journal of dermatology, Supplement” This study found that a topical vitamin D3 analogue had an anti-proliferative effect on guinea pig skin epidermis.
January 2026 in “Annals of Dermatology”