Another detrimental neurodegenerative disorder, Parkinson’s disease (PD), also exhibits higher peripheral concentrations of inflammatory markers—including IL-6, TNF, IL-1β, IL-2, IL-10, CRP and regulated upon activation, normal T cell expressed and presumably secreted (RANTES)—according to a meta-analysis that included 25 studies [80]. Here, TNF is linked to Parkinson disease.