Risks of probiotic supplement

What are the benefits of taking probiotic supplements? Bacteria have a reputation for causing diseases, so the idea of investing billions of dollars in good health every day seems hard to understand. However, more and more scientific evidence shows that you can use foods and supplements containing certain types of live bacteria to treat or even prevent certain diseases. These beneficial microorganisms are called probiotics (meaning "for life" from the affinity biota). Should I take probiotic supplements? In some cases, they may be helpful, but we still need to conduct more research to tell us if and when they are safe and effective for the elderly.