To understand how this works, you first need to understand what mitochondria are. They are the tiny organelles in your cells that convert the sugar and fat you eat into the adenosine triphosphate (ATP) that your cells use to power the chemistry of life.
Mitochondria are, in essence, the engines of your cells, and by extension, the engines that power you. If your engines aren't working efficiently or run out of fuel, your cells will run out of energy, and so will you. The end result: fatigue.
To make ATP, which is so essential for powering your cells, you require B vitamins, minerals, antioxidants, and co-enzyme Q in sufficient amounts.