 A 2013 meta-analysis of case-control and cohort studies found limited evidence for an association between higher garlic consumption and reduced risk of prostate cancer, but the studies were suspected as having publication bias.A 2013 meta-analysis of epidemiological studies found garlic intake to be associated with decreased risk of prostate cancer.A 2014 Cochrane review found insufficient evidence to determine the effects of garlic in preventing or treating the common cold.