The document discusses antimicrobials and their use for gastrointestinal (GI) issues. It defines antimicrobials as agents that kill or inhibit microorganisms, including natural substances like oregano, ginger, and garlic. It notes that antibiotics are a type of medicine that inhibits microorganisms but can destroy the immune system and have side effects. The document recommends natural antimicrobials as they provide nutrients and do not harm the body like antibiotics can for GI-related conditions. It provides the example of small intestinal bacterial overgrowth (SIBO) to illustrate how natural antimicrobials like oregano can be used to treat specific cases.