You probably associate getting enough fiber—the non-digestible “roughage” we get from plant foods—with good elimination. You may also know that fiber helps maintain a healthy weight by filling you up so you eat fewer calories, or even that fiber helps to maintain good cholesterol levels. But how can eating fiber strengthen your immunity?The answer is that fiber nourishes the trillions of beneficial bacteria (probiotics) that live in our intestines, where they are a crucial part of our immune systems. Anywhere from 60-80% of immune system activity takes place in the intestines, where probiotics attack pathogens with powerful antimicrobial substances. These substances are often as powerful as the strongest antibiotic medications, but they don’t kill off good gut bacteria as is done by antibiotic drugs.According to Rachel Begun, MS, RDN, quoted in a recent issue of Environmental Nutrition, various aspects of modern life have altered gut microflora, damaging immunity and leading to signifi…