Coprococcus can assess human gastrointestinal health as a biomarker [58], and it has also now been shown that Coprococcus eutactus, a promising probiotic, can ameliorate colitis by reducing the levels of the pro-inflammatory cytokines TNF-α and IL-1β, and increasing the levels of the anti-inflammatory factors IL-5 and IL-10. The gene discussed is IL5; the disease is colitis.