The American College of Gastroenterology has released a new scientific review of the research on irritable bowel syndrome (IBS) and chronic constipation that is not due to a known cause. As reported on the website, WebMD, the review reassesses some current treatments and emphasizes finding novel approaches to these conditions, including diet choices. One of the co-authors of the review stated, for example, that there is now good evidence that low-sugar consumption can help some people. Fiber supplements also appear to be helpful for constipation, and to a lesser extent for IBS symptoms. In addition, the review also takes a look at probiotics (good bacteria), which it says can help improve symptoms such as bloating and flatulence in IBS. It gives a weaker recommendation to prebiotics, which support probiotic growth, and to symbiotic products, which contain both prebiotics and probiotics.