Asahi Breweries Ltd. said Wednesday that hops used in beer production contain a substance that neutralizes the verotoxin that causes the deadly O-157 strain of E. coli bacteria.

The neutralizing effect of the substance, known as hop bract polyphenols, was confirmed on a joint basis by a group of Asahi researchers and a research team led by Masatoshi Noda, a professor at Chiba University’s Graduate School of Medicine, the brewer said.

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