Fibermaxxing Goes Mainstream as Scientists Validate Gut Health Benefits

A Washington State University study published in Current Developments in Nutrition found that just 14% of more than 3,000 commonly consumed foods and beverages meet the FDA's updated definition of 'healthy.' The research analyzed foods drawn from the National Health and Nutrition Examination Survey (NHANES), a nationally representative dataset of what Americans actually eat, and found that high sodium and saturated fat content — frequently introduced during food processing — were the most common reasons foods failed to qualify.

Under the updated rule finalized in 2025, a food or beverage can be labeled 'healthy' if it contains a minimum serving from a recommended dietary food group — such as fruits, vegetables, or whole grains — and maintains limits on sodium, saturated fat, and added sugars. Lead researcher Kayla Hooker of WSU's Elson S. Floyd College of Medicine noted that the new food-group-based framework is easier for shoppers to use than the previous nutrient-by-nutrient standard.

The FDA is also developing a visual 'healthy' logo, similar to the USDA Organic seal, that manufacturers could use on packaging to help consumers quickly identify qualifying products. The WSU team says the research confirms that the updated definition effectively identifies foods with higher nutrient density, though the findings also highlight a substantial gap between the foods Americans regularly buy and those that meet the new standard.

Research from the University of Michigan and the University of Texas MD Anderson Cancer Center, published in Cellular and Molecular Gastroenterology and Hepatology, has identified a critical genetic factor that determines whether omega-3 fish oil supplements help prevent colorectal cancer — or potentially make it worse. The gene in question, ALOX15 (15-lipoxygenase-1), produces an enzyme the body needs to convert EPA and DHA from fish oil into inflammation-reducing compounds called resolvins. Without active ALOX15, this conversion fails to occur, and in animal models, fish oil actually increased colon tumor numbers.

In mouse studies, animals fed EPA-rich diets with active ALOX15 developed fewer and smaller colon tumors, while mice lacking the enzyme saw no benefit — and in some cases saw greater tumor growth when supplementing with DHA. The researchers note that ALOX15 is commonly suppressed in several types of cancer, which may help explain why large-scale clinical trials on fish oil have yielded inconsistent results.

The findings have practical implications for the estimated 19 million American adults who take fish oil supplements. Researchers suggest that screening cancer patients for ALOX15 activity could guide personalized supplementation decisions. The team is also working to develop medications that boost ALOX15 levels in cancer cells to enhance the body's ability to benefit from omega-3 intake.