Obesity associated with metabolic inflammation is characterized by excessive accumulation of adipose tissue combined with chronic low-grade inflammatory signaling, altered insulin response, disrupted energy regulation, mitochondrial stress, endothelial dysfunction, and changes in hormonal communication between adipose tissue, liver, skeletal muscle, pancreas, and the gastrointestinal tract. Excess visceral adipose tissue can increase inflammatory cytokine production and contribute to dysregulated signaling involving insulin, leptin, adiponectin, TNF-α, IL-6, NF-κB, mTOR, and oxidative stress pathways. Metabolic inflammation is strongly associated with increased oxidative burden, altered glucose handling, impaired mitochondrial efficiency, elevated triglyceride storage, endothelial stress, and changes in appetite regulation. Dietary patterns high in ultra-processed foods, refined sugars, excess saturated fats, low fiber intake, and low phytonutrient density are associated with increased inflammatory signaling and metabolic dysfunction. Reduced intake of whole plant foods may also negatively affect gut microbiome diversity and short-chain fatty acid production, contributing to impaired intestinal barrier integrity and inflammatory activation. High caloric density foods with low nutrient density may promote overeating by reducing satiety signaling and altering dopamine-related reward responses. Whole-food plant-based dietary patterns rich in legumes, vegetables, fruits, mushrooms, herbs, spices, seeds, and intact whole grains are associated with lower inflammatory markers, improved insulin sensitivity, increased dietary fiber intake, improved satiety signaling, and enhanced microbiome diversity. Fiber-rich foods support SCFA production and may influence GLP-1 signaling, AMPK signaling, insulin sensitivity, and gut barrier function. Foods naturally rich in polyphenols, carotenoids, flavonoids, lignans, and glucosinolate-derived compounds are associated with reduced oxidative stress and modulation of inflammatory signaling pathways. Metabolic inflammation also involves dysregulation of lipid metabolism and altered mitochondrial energy production. Excess caloric intake combined with low physical activity can contribute to de novo lipogenesis, impaired beta-oxidation, elevated circulating free fatty acids, and increased oxidative stress within adipocytes and hepatocytes. Increased inflammatory signaling can interfere with insulin receptor activity and glucose transport mechanisms, contributing to insulin resistance and metabolic syndrome features. Plant foods containing resistant starches, soluble fiber, magnesium, potassium, vitamin C, carotenoids, and flavonoids are associated with improved metabolic flexibility, improved vascular function, reduced inflammatory burden, and healthier body composition regulation. Dietary patterns emphasizing intact whole foods with high fiber density and lower caloric density are consistently associated with healthier weight regulation and reduced inflammatory signaling in metabolic tissues.