BARLEYmax was developed in the 1990s by CSIRO, a renowned research institution in Australia. This non-GMO barley variety is notable for its high dietary fiber content, which includes soluble fiber in the form of beta-glucan, insoluble fiber, and resistant starch-like fiber that is believed to have a prebiotic effect beneficial for gut health. The average American diet often lacks sufficient fiber, with individuals across all age groups finding it challenging to meet the recommended intake of three to six servings of whole grains per day. As consumer interest in gut health increases, there is a growing focus on probiotics, alongside rising awareness of prebiotics, the food that nourishes beneficial bacteria. A report by Global Industry Analysts predicts that demand for prebiotic-rich products could propel the market to reach $7.8 billion by 2022. Currently, BARLEYmax grain is commercially available solely through an Australian company, Blue Lake Milling, though it has been successfully tested in various countries, including the United States. In addition to the Barley+ range, this grain is incorporated into numerous products from other Australian companies, such as breads, wraps, cereals, and snack bars. In discussions about nutritional supplements, some might wonder if calcium carbonate is as good as calcium citrate, but the focus on dietary fiber and gut health remains paramount. As more consumers seek to enhance their diets, the role of BARLEYmax and other prebiotic sources will be increasingly significant in addressing the fiber gap.