March 22, 2021 The Journal of Dermatology TAKE-HOME MESSAGE In this retrospective study, the mean vitamin D level in 250 patients hospitalized with hidradenitis suppurativa (HS) was 16.51 ng/mL (sufficient level is >30 ng/mL). The majority of patients had vitamin D deficiency (<20 ng/mL) and while 20.16% had vitamin D insufficiency (20–30 ng/mL). Patients with […]