The new formula utilizes a blend of A2 colostrum, L-glutamine, prebiotic fiber, and postbiotics to address the physical integrity of the gut barrier. According to Dr. Ren-Hau Lai, Vice President of Product Innovation, the company shifted its focus to barrier health to better support the underlying systems that govern microbiome balance and nutrient absorption. The supplement is formulated to be additive-free and specifically tailored for individuals with sensitive digestive systems.

Key components include A2 colostrum sourced from grass-fed cows and heat-inactivated Lacticaseibacillus paracasei, a postbiotic clinically studied for its role in mitigating age-related intestinal permeability. The inclusion of L-glutamine is intended to support cellular resilience and GLP-2 signaling, a natural hormone pathway critical to maintaining gut health. By targeting the protective barrier directly, Plexus seeks to provide a more systemic solution for customers managing the physiological toll of modern lifestyle challenges.