KEGG enrichment bubble plots on day 7 show that nitrite concentrations resulted in a large enrichment of differential metabolites in biosynthesis of phenylpropanoids; TCA cycle; folate biosynthesis; carbon metabolism; glyoxylate and dicarboxylate metabolism; glucagon signaling pathway; alanine, aspartate, and glutamate metabolism; galactose metabolism; and central carbon metabolism in cancer, among other specific metabolic pathways (Figure 11). This evidence concerns the gene GCG and cancer.