Which term best describes non-harmful bacteria that can assist in digestion?

The term that best describes non-harmful bacteria that can assist in digestion is probiotics. Probiotics are live microorganisms, often referred to as "good" or "friendly" bacteria, that contribute positively to the digestive system's health. These beneficial bacteria can help maintain a balanced gut microbiota, which is crucial for effective digestion, nutrient absorption, and overall gut health. Probiotics are commonly found in fermented foods like yogurt, kefir, sauerkraut, and can also be taken as dietary supplements.

In contrast, pathogens are harmful microorganisms that can cause diseases. Antibiotics are medications used to kill or inhibit the growth of bacteria, including both harmful and beneficial strains, and they do not describe bacteria but rather substances that affect them. Parasites, on the other hand, are organisms that live on or inside a host and can cause disease, differing significantly from the concept of beneficial bacteria found in probiotics. Understanding the role of probiotics in digestion emphasizes their importance in promoting health and preventing gastrointestinal issues.