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Many users attest to the benefit of Beano, an over- the-counter solution of alfa-galactosidase, in preventing flatulence. However, few scientific studies have addressed its efficacy. Researchers at the University of California at San Diego assessed Beano in a randomized, double-blind crossover study.
Nineteen volunteers received eight drops of Beano (260 galactosidase units) or placebo after the first bite of meatless chili (prepared with navy, pinto, and kidney beans) and after each one-cup portion (subjects ate as much as they wanted). The meal was at noon; over the next six hours, subjects ingested nothing but water and carefully recorded symptoms on a standardized form that included a validated "flatulogram." One week later, the identica…