Candida overgrowth describes an imbalance in the intestinal microbiome where yeast organisms, particularly Candida species, become disproportionately abundant within the digestive tract. This imbalance is commonly associated with disrupted gut microbial diversity, reduced beneficial bacterial populations, excessive intake of refined sugars and ultra-processed foods, chronic stress, reduced dietary fiber intake, poor sleep quality, and repeated exposure to environmental toxins and food additives. Digestive yeast imbalance is frequently associated with bloating, gas, irregular bowel movements, cravings for refined carbohydrates, post-meal fatigue, brain fog, skin irritation, and intestinal discomfort. The intestinal environment is strongly influenced by diet composition. Diets low in fermentable fibers and plant polyphenols may reduce production of short-chain fatty acids and beneficial microbial metabolites that help maintain epithelial barrier integrity and microbial balance. Reduced microbial diversity may alter immune signaling, increase intestinal permeability, and elevate inflammatory mediators associated with digestive dysfunction. Excessive intake of refined sugars and processed foods may contribute to an intestinal environment favorable for yeast expansion. Plant-based dietary patterns rich in vegetables, legumes, herbs, spices, berries, cruciferous vegetables, mushrooms, and polyphenol-rich foods are associated with greater microbial diversity and improved intestinal barrier support. Fiber-rich foods increase fermentation by beneficial microbes and support short-chain fatty acid signaling pathways involved in gut lining maintenance and inflammatory regulation. Polyphenols from berries, green tea, garlic, onions, broccoli, kale, and herbs interact with microbial ecosystems and may help maintain microbial balance through antioxidant and metabolic mechanisms. Candida overgrowth is also linked with oxidative stress pathways, impaired epithelial integrity, altered inflammatory signaling, and dysregulated glucose metabolism. Elevated blood sugar variability may contribute to microbial imbalance by increasing substrate availability within the digestive tract. Whole-food plant-based dietary patterns emphasizing fiber, phytonutrients, hydration, and diverse plant intake are associated with improved gastrointestinal resilience and enhanced microbiome diversity. Cruciferous vegetables such as broccoli, kale, cabbage-green, and cauliflower provide glucosinolate-derived compounds associated with detoxification and epithelial barrier pathways. Garlic, onion, oregano-fresh-raw, ginger-ground, turmeric-ground, and green-tea-brewed provide sulfur compounds and polyphenols that interact with microbial metabolism and inflammatory pathways. Legumes, oats-cooked, quinoa-cooked, brown-rice-cooked, flax-seeds-whole-raw, chia-seeds-whole-dried, and vegetables rich in soluble fiber support fermentation and production of microbial metabolites linked to gut health. Maintaining diverse plant intake while minimizing refined sugars and ultra-processed foods supports a healthier intestinal environment associated with improved microbial balance and digestive function.