How often do you think of the health of your cells? Few of us do, but we should. Our bodies are made up of trillions of cells, each with its own vitally important role. The heart cells keep our heart beating; brain cells keep our brain working, and skin cells maintain our skin’s integrity. In short, without healthy cells, we cannot have healthy bodies. In order for our cells to do their jobs effectively they need a constant supply of energy. Our mitrochondria are key structures within almost all our cells which generate the energy required to stay healthy and perform optimally. There are a number of strategies which can promote cellular and mitrochondial health. Maintaining a healthy and active lifestyle, eating a balanced diet, manageing stress, and incorporating targeted advanced nutrition interventions can greatly contribute to cellular energy production and, ultimately, improved healthspan and longevity. In this article, we will explore the importance of mitochondrial health, and the role of a novel postbiotic nutrient, Urolithin A, in achieving a healthy gut biome for a long and healthy life.