Spermidine trihydrochloride is widely used in biomedical research due to its role in cellular processes. It is primarily studied for its ability to induce autophagy, a process that helps cells remove damaged components and maintain proper function. This property makes it valuable in research on aging, neurodegenerative diseases, and cancer. Additionally, it is utilized in studies exploring its potential to improve cardiovascular health and enhance longevity. In cell culture experiments, spermidine trihydrochloride is often added to media to investigate its effects on cell growth, survival, and stress resistance. Its applications extend to the development of therapeutic strategies targeting age-related diseases and metabolic disorders. Furthermore, it is incorporated into cosmetic products to promote skin health, reduce wrinkles, and improve skin elasticity.