First principles of Energy:
Energy creation is fundamental to life, and mitochondria are essential to energy production. To understand health from first principles, it is essential to understand how the body fulfills this fundamental process. It stands to reason that in order to optimize performance and longevity, one should optimize mitochondrial function.
To optimize mitochondrial function, it’s important to understand how they do what they do. Mitochondria are organelles, or one of many working parts of a cell. A cell can have varying amounts of mitochondria, depending on its function. Organs that require a lot of energy generally have cells with a lot of mitochondria. Through a complex but elegant process, mitochondria generate ATP, a molecule with high energy bonds that can be used elsewhere in the cell to carry out essential processes.

Energy, from First Principles
Mitochondria