A probiotic is a type of beneficial bacteria that can help maintain a healthy balance in the gut. These microorganisms are found in various foods, such as yogurt and fermented products, and can also be taken as dietary supplements. Probiotics are known to support digestion and may enhance the immune system. When consumed, probiotics can help restore the natural balance of gut flora, especially after disruptions caused by factors like antibiotics or poor diet. They may also play a role in preventing certain gastrointestinal issues, such as irritable bowel syndrome and diarrhea.