الثوم والسرطان

 Another meta-analysis found decreased rates of gastric cancer associated with garlic intake, but cited confounding factors as limitations for interpreting these studies.^[45] Further meta-analyses found similar results on the incidence of gastric cancer by consuming allium vegetables including garlic.^[46][47] A 2014 meta-analysis of observational epidemiological studies found that garlic consumption was associated with a lower risk of stomach cancer in Korean people.^[48]
A 2016 meta-analysis found no effect of garlic on colorectal cancer.^[49] A 2014 meta-analysis found garlic supplements or allium vegetables to have no effect on colorectal cancers.^[50]

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.^[51] A 2013 meta-analysis of epidemiological studies found garlic intake to be associated with decreased risk of prostate cancer.^[52]