Sensitive teeth, commonly described as dentin hypersensitivity, occurs when exposed dentin responds sharply to cold, heat, air, brushing, sweet foods, or acidic foods. Dentin is the mineralized tissue beneath enamel and cementum. It contains microscopic tubules that communicate with the inner pulp chamber. When enamel becomes thin, gums recede, cementum is lost, or dentin tubules become exposed, fluid movement inside the tubules can stimulate nerve endings and create brief, sharp discomfort. This pattern is different from long-lasting tooth pain because dentin hypersensitivity is usually stimulus-driven and short in duration. Diet influences this condition through mineral balance, oral acid exposure, saliva quality, gum tissue integrity, inflammatory tone, and oral microbiome activity. Frequent acidic beverages, highly processed foods, chronic low mineral intake, dehydration, and inflammatory dietary patterns may contribute to enamel weakening and gum irritation. Saliva plays an important protective role because it buffers acids, supplies calcium and phosphate, and supports oral remineralization processes. Reduced saliva flow or chronically acidic oral conditions may increase enamel stress and dentin exposure. A whole food plant-based dietary pattern emphasizing mineral-rich vegetables, legumes, seeds, leafy greens, herbs, and antioxidant-containing whole foods may help support oral tissue resilience and healthy mineral balance. Calcium, magnesium, phosphorus, vitamin C compounds, vitamin K1 compounds, and antioxidant polyphenols are involved in connective tissue integrity, gum support, collagen pathways, and mineralization systems associated with tooth structure maintenance. Leafy greens, broccoli, kale, sesame seeds, chia seeds, almonds, chickpeas, lentils, strawberries, oranges, carrots, and green tea provide nutrients and phytochemicals associated with antioxidant defense systems, inflammatory balance, salivary support, and connective tissue maintenance. Polyphenols from green tea, berries, onions, and herbs may help support oral microbial balance and oxidative defense pathways. Fiber-rich plant foods may also support healthier dietary patterns by reducing exposure to refined sugars and highly processed acidic foods associated with enamel stress. Maintaining hydration, supporting saliva production, minimizing excessive acidic beverage intake, reducing highly processed foods, and emphasizing mineral-rich whole plant foods may help support overall oral tissue resilience and dentin protection biology.