Your gut is home to trillions of microorganisms collectively known as the microbiome. These bacteria, fungi, and viruses aren’t just passengers — they’re vital to your health. They help digest food, regulate immunity, and even influence mood and brain function through what scientists call the “gut-brain axis.” A healthy microbiome thrives on balance. When diversity drops due to antibiotics, processed foods, or stress, harmful bacteria can dominate, leading to bloating, inflammation, and diseases like irritable bowel syndrome. To nurture your microbiome, eat fiber-rich foods such as fruits, vegetables, and whole grains. Fermented foods like yogurt, kefir, and kimchi provide probiotics that replenish good bacteria. Avoid excessive sugar and ultra-processed snacks, which feed harmful microbes. Gut health doesn’t improve overnight, but small dietary changes can restore harmony, enhancing digestion, immunity, and emotional balance.