Extracellular vesicles are a heterogeneous group of membrane structures that cells release into the extracellular space.[1] They have the ability to increase tissue regeneration and participate in immune modulation.[1] They transport bioactive components and overcome biological barriers, which is why they are being investigated as therapeutic agents.[1] They serve as an alternative to stem cell therapy, and when biologically modified, they can carry various therapeutic substances.[1] Exosomes, 30-100 nm in size, contain small non-coding RNAs and other regulatory molecules and are produced by almost all cell types.[8] They reduce the amount of cholesterol compared to other cell membranes and contain lipid metabolism enzymes.[1] The ability of exosomes to reflect the patient's response to treatment is their potential use in clinical practice.[1][7]