Probiotics have become one of the most talked-about health supplements of the decade—promoted for gut health, immune support, mental clarity, and even chronic disease prevention. But despite their popularity, confusion remains: Do probiotics actually work? Are they safe? Which strains matter most? A selection of yogurt, kimchi, and sauerkraut showcasing probiotic-rich foods. They Work in the Body? Probiotics are live microorganisms—primarily beneficial bacteria and yeasts—th