The dietary fiber offered by the psyllium seed husks provides many nutritional benefits for the health and detoxifying properties of the gastrointestinal tract. Soluble dietary fiber, such as pectin, many gums, and some hemicelluloses, are fermented in the colon to varying degrees. This results in lower colonic pH (acidity) and the production of short chain fatty acids, important for the health and detoxifying power of not only mucosal cells, but also the intestinal microflora. Probiotic dietary Lactobacillus acidophilus colonizes the intestinal tract, depending on the specific bacterium-to-host affinity. Bacteria are continually in competition for colonization space. The original bacterial colonies have an advantage over transient bacteria. Nevertheless, the composition of the intestinal microflora is dynamic and constantly changing. If harmful microorganisms proliferate, the equilibrium is disturbed, and it becomes difficult even for indigenous bacteria to maintain their necessary territory to colonize the intestine. Antibiotics tend to clear the body of both beneficial and harmful bacteria, and thus may also disturb the normal, healthy balance of intestinal microorganisms.