IL1B and seborrheic dermatitis: Human studies have shown that cytokine levels (IL-1α, IL-1β, IL-2, IL-4, IFN-γ, IL-10, and IL-12) in the skin of individuals with seborrheic dermatitis and Malassezia folliculitis were higher than levels in the skin of healthy volunteers (Faergemann et al., 2001).