They are nano-sized vesicles that carry numerous growth factors, proteins and genetic information released from cells. They take part in communication between cells. They provide cell repair by stimulating targeted cells. Although it can be obtained from many sources, umbilical cord blood, bone marrow and fat cells are the main sources of exosomes. It can be used in skin rejuvenation, scar (wound/mark), acne or acne scar treatment, wound healing, male and female pattern hair loss, hyperpigmentation and melasma.