Co：同请，恭请。我在PubMed里搜到这三篇(比较正面的结果):

Effect of oil pulling on halitosis and microorganisms causing halitosis: a randomized controlled pilot trial.  2011年研究

Effect of oil pulling on plaque induced gingivitis: a randomized, controlled, triple-blind study.  2009年研究

Effect of oil pulling on Streptococcus mutans count in plaque and saliva using Dentocult SM Strip mutans test: a randomized, controlled, triple-blind study.  2008年研究