A South Indian gut-healing approach offers autistic adults a practical, science-backed pathway to calmer moods, steadier energy, and better daily comfort by nurturing the microbiome through familiar, culturally rooted foods. By combining fermented staples, fiber-rich vegetables, omega-3 sources, and gentle anti-inflammatory dishes, families can systematically repair gut lining integrity, reduce inflammation, improve motility, and support more balanced emotional responses. This article outlines microbiome fundamentals, ASD-specific gut challenges, optimized recipes, a 7-day healing meal plan, sensory-friendly adaptations, and a practical 30-day monitoring system—making transformation achievable even for busy households. At its heart, the message is simple: consistent, nourishing South Indian food is one of the most loving, sustainable gifts caregivers can offer, helping autistic adults thrive with dignity, comfort, and greater independence.