Probiotics are live microorganisms, often referred to as "good" bacteria, that provide health benefits when consumed in adequate amounts. They are commonly found in fermented foods like yogurt, kefir, and sauerkraut, as well as in dietary supplements. Probiotics help maintain a balanced gut microbiome, which is essential for digestion and overall health. These beneficial bacteria can support the immune system, improve digestion, and may even help alleviate certain gastrointestinal issues, such as irritable bowel syndrome (IBS). Research continues to explore the potential benefits of probiotics for various health conditions, including allergies and mental health.