Plant compounds called tannins are being studied as natural alternatives to antibiotics for farm animals. Tannins have many beneficial effects like fighting off harmful microbes, reducing inflammation, and boosting the immune system. They are especially useful for improving protein use in ruminant animals and controlling parasites and bacteria in their diets. While tannins were once seen as harmful for other animals, recent studies show they can actually improve gut health and productivity when used correctly. The effectiveness of tannins as antibiotic alternatives varies depending on how they are used.