Dietary fiber blends, often labeled as "fiber blend (proprietary)," are widely used to support the large intestines (colon) due to their well-established role in promoting digestive health. Scientific evidence demonstrates that both soluble and insoluble fibers contribute to bowel regularity by increasing stool bulk and water content, which facilitates easier and more frequent bowel movements. Clinical studies have shown that fiber supplementation can alleviate symptoms of constipation and may help in managing conditions like irritable bowel syndrome (IBS) and diverticulosis.

In addition to improving bowel motility, fibers serve as prebiotics, selectively stimulating the growth of beneficial gut bacteria. This fermentation process produces short-chain fatty acids (SCFAs), such as butyrate, which are vital for colonocyte health and have anti-inflammatory properties. Multiple meta-analyses and reviews from reputable sources, including the World Health Organization and the American Gastroenterological Association, support the use of dietary fiber for colon health, reduction of colorectal cancer risk, and overall digestive well-being.

Proprietary blends often combine various sources of fiber (e.g., psyllium, inulin, oat bran), aiming to harness the unique benefits of each. While the exact composition of proprietary blends may not always be disclosed, the collective body of scientific research on dietary fibers justifies their use for supporting large intestine function and health.