A prebiotic is a type of dietary fiber that serves as food for beneficial bacteria in the gut. These fibers are not digested by the human body but instead promote the growth and activity of healthy gut microbiota, which can improve digestive health and overall well-being. Common sources of prebiotics include foods like garlic, onions, bananas, and asparagus. By nourishing good bacteria, prebiotics can help enhance the immune system, improve nutrient absorption, and may even influence mood and mental health. Incorporating prebiotic-rich foods into your diet can support a balanced gut microbiome, which is essential for maintaining health and preventing various diseases.