Autologous fat grafting and adipose-derived stem cell (ADSC) therapy are advancing regenerative and aesthetic medicine; however, challenges remain in optimizing harvest, processing, and grafting for improved engraftment. Innovations like cell-enriched lipotransfer (CELT) and cryopreservation of adipose tissue enhance viability and decrease the need for repeat procedures. Systemic ADSC applications show promise for treating degenerative diseases, while exosomes and secretomes open up new regenerative pathways. Regulatory challenges necessitate standardized protocols to facilitate clinical application. Interdisciplinary collaboration and flexible frameworks are crucial for realizing the full potential of fat grafting and ADSC therapies.