research The Association of Serum Adipokines, Insulin Resistance and Vitamin D Status in Male Patients with Androgenetic Alopecia February 2023 in “Clinical, Cosmetic and Investigational Dermatology” Higher leptin and lower vitamin D levels may contribute to male pattern baldness.
research Vitamin D Level in Female Pattern Hair Loss with Normal Androgen Level January 2019 in “Menoufia Medical Journal” Lower vitamin D levels may contribute to female hair loss.