These experiments have revealed that Rab11a‐exosomes have unique activities in physiology and disease, for example, promoting growth in the colorectal cancer (CRC) HCT116 cell line via a membrane‐bound form of amphiregulin (AREG), the ligand for the EGF receptor (EGFR, otherwise known as human EGFR‐related 1, HER1) ligand (Marie et al., 2023). Here, EGFR is linked to colorectal cancer.