Boosting immunity, beating colds

Doctors said beta-glucan—an insoluble fiber that grows naturally on brewer’s yeast malted grain—supported the body’s natural immune response, triggering its defense against invading pathogens.
In this study, 162 healthy people with recurring colds took 900 mg of insoluble yeast beta-glucan per day or a placebo. Participants kept a diary tracking colds and rating 10 cold symptoms. After 16 weeks, compared to placebo, the beta-glucan group reported sleeping more soundly during colds, recorded 25 percent fewer colds, and when there was a cold, had 15 percent milder symptoms.

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