Spermidine, a naturally occurring compound that our bodies naturally produce when we are young, is gaining increasing recognition as a promising longevity molecule. Ground-breaking research highlights its potential to slow both internal ageing processes and visible signs of ageing by activating autophagy'our body's innate "clean-up" and recycling system. This presentation explores how spermidine addresses the fundamental drivers of ageing, known as the 'Hallmarks of Ageing,' namely through autophagy. From reducing inflammation and rejuvenating stem cells and mitochondria to promoting gut health and hormonal balance, discover the science behind this transformative compound and its role in promoting vitality and longevity at the cellular level.