t9,t11,c15-CLNA is an isomer of conjugated linolenic acid (CLNA) produced by Lactobacillus plantarum ZS2058. It exhibits key activities including anti-inflammatory and antioxidant effects, as well as enhancement of intestinal barrier function. The regulatory mechanisms of t9,t11,c15-CLNA involve the upregulation of tight junction proteins, the inhibition of pro-inflammatory cytokines (such as TNF-α, IL-6), and the activation of antioxidant enzymes (such as SOD, CAT). t9,t11,c15-CLNA can be utilized in research on inflammatory bowel disease (like colitis).