Shoulder pain associated with rotator irritation, repetitive strain, connective tissue stress, or inflammatory joint discomfort often involves multiple overlapping biological processes including oxidative stress, tissue inflammation, collagen remodeling, impaired circulation, and altered muscular support around the shoulder complex. The rotator cuff contains highly active connective tissues that rely on adequate blood flow, amino acid availability, antioxidant protection, and balanced inflammatory signaling for structural maintenance and recovery. Excess intake of ultra-processed foods, oxidized fats, excessive sodium, refined sugars, and inflammatory dietary patterns may contribute to increased inflammatory mediators including prostaglandins, leukotrienes, NF-κB signaling, and oxidative tissue burden. Inflammatory shoulder discomfort may also be associated with repetitive mechanical loading, poor posture, metabolic stress, reduced mitochondrial efficiency, elevated oxidative burden, impaired collagen support, and decreased nutrient density. Connective tissues including tendons, ligaments, and surrounding muscle fascia require continual remodeling through collagen biosynthesis pathways, amino acid metabolism, and antioxidant defense systems. Nutrients such as vitamin C, magnesium, manganese, copper, and amino acids including glycine, proline, lysine, and glutamine contribute to structural support and tissue maintenance. Plant-based foods rich in polyphenols, carotenoids, flavonoids, nitrates, sulfur compounds, and antioxidant phytochemicals are associated with modulation of inflammatory signaling pathways and oxidative stress responses. Cruciferous vegetables, berries, leafy greens, legumes, herbs, mushrooms, seeds, and colorful vegetables contain compounds linked to support of connective tissue integrity, nitric oxide balance, mitochondrial activity, and antioxidant enzyme systems. Sulforaphane-rich vegetables and polyphenol-rich berries have been studied for interactions with NF-κB, Nrf2, prostaglandin signaling, and oxidative stress pathways associated with tissue irritation and inflammatory discomfort. A whole-food plant-based dietary pattern emphasizing hydration, fiber-rich foods, antioxidant diversity, mineral density, and minimally processed ingredients may support healthier inflammatory balance and metabolic function. Foods rich in nitrates and potassium may support circulation and vascular delivery to connective tissues, while flavonoids and carotenoids contribute to antioxidant defense systems. Consistent intake of nutrient-dense plant foods may help support tissue recovery processes, cellular repair pathways, collagen turnover, mitochondrial energy production, and overall musculoskeletal resilience.