IL6 and Anxiety: Inconsistently, anxiety symptoms were linked to both higher (Zoccola, Dickerson, & Yim, 2011) and lower (O ’Donovan et al., 2010) cortisol, as well as higher (Hoge et al. 2009; O ’Donovan et al. 2010; Pitsavos et al. 2006) and lower (Vogelzangs et al. 2013) interleukin-6 (IL-6) measurements.