They carry essential bioactive molecules such as proteins, growth factors, and microRNAs, which help regulate inflammation, promote tissue repair, and support cellular regeneration. When used alongside stem cell therapy, exosomes enhance the therapeutic effects by amplifying the regenerative signals stem cells provide, improving outcomes in conditions like arthritis, neurodegenerative diseases, and skin aging. This combination accelerates healing, reduces inflammation more effectively, and enhances the body’s ability to repair damaged tissues, making stem cell treatments even more potent and efficient.