FASN and neoplasm: In the Med-3100 population, the fungi were mainly members of Candida. It is possible that Penicillium species contributed to the gut ecosystem as they are producers of secondary metabolites, extracellular enzymes (alginase, endoglucanase, β-glucosidase), and bioactive compounds (anti-tumor, anti-fungal, and antibacterial activity), while some species possess fatty acid synthases that fulfil numerous central biological roles in living cells [80, 81].