Study proposes expected role for probiotics in forestalling respiratory infections Kumar Jeetendra | May 15, 2021 Daily probiotic use was associated with fewer upper respiratory symptoms in overweight and older people, according to a study which suggests a potential role for probiotics in preventing respiratory infections. Researchers re-analyzed detailed daily diaries of 220 patients who engaged in a previous double-blind placebo-controlled study on probiotics and weight loss. Reviewing the entries for …