Artificial sweetener sensitivity refers to gastrointestinal discomfort or altered digestive response that may occur after consuming non-nutritive sweeteners such as sucralose, saccharin, aspartame, acesulfame potassium, or related synthetic sweetening agents. Symptoms may include bloating, gas, loose stool, abdominal pressure, altered bowel rhythm, nausea, cramping, or a noticeable change in post-meal digestive comfort. The biological response is not uniform. Published research shows that non-nutritive sweeteners can produce person-specific effects, with some individuals showing measurable changes in gut microbial composition, glycemic response, and intestinal signaling while others show limited response. The digestive tract is highly responsive to sweet taste signaling, intestinal nutrient sensing, microbial fermentation patterns, osmotic load, and enteroendocrine hormone release. Sweet taste receptors are present not only on the tongue but also in the intestine, where they interact with nutrient-sensing pathways and may influence glucose transporter activity, incretin hormone signaling, and post-meal metabolic response. Artificial sweeteners provide sweet taste without intact whole-food structure, fiber, minerals, phytochemicals, or natural carbohydrate matrices. This mismatch may influence taste adaptation, appetite signaling, gut motility, microbiome behavior, and digestive tolerance in susceptible individuals. A whole food plant-based diet can support a steadier digestive environment by replacing synthetic sweeteners and highly processed sweetened products with naturally sweet, fiber-containing whole foods. Apple, banana, blueberry, strawberry, orange, sweet potato, oats, brown lentils, chickpeas, broccoli, ginger, and green tea provide soluble fiber, resistant starch, polyphenols, flavonoids, vitamin C compounds, potassium, magnesium, and plant-based prebiotic substrates that support microbial diversity, stool form, intestinal barrier function, and short-chain fatty acid production. These foods contain nutrients in their natural cellular structure rather than isolated sweetening compounds. Fiber-rich whole foods slow carbohydrate delivery, support satiety, increase microbial fermentation of beneficial substrates, and help maintain bowel regularity. Oats and legumes provide beta-glucan, resistant starch, and fermentable fibers that support short-chain fatty acid signaling. Berries, apple, orange, broccoli, ginger, and green tea provide flavonoids, catechins, quercetin, hesperidin, anthocyanins, sulforaphane-related compounds, and gingerols associated with antioxidant defense, epithelial barrier support, and inflammatory balance. For artificial sweetener sensitivity, the dietary focus is not adding another sweetener but removing synthetic sweeteners and rebuilding normal taste, microbiome, and gut barrier patterns with intact whole plant foods.