Overexpression of the chemoattractant CCL2 has been associated with advanced tumor stages, metastatic disease and poor prognosis in CRC.(64, 65) Furthermore, CRC cells produce lactic acid as a by‐product of predominantly aerobic glycolysis.(66) Proliferating cancer cells switch their metabolism toward aerobic glycolysis, which is known as the ‘Warburg effect’. Here, CCL2 is linked to colorectal carcinoma.