According to a handout from America's Compounding Center, "The Mitochondrial Cocktail or "mito cocktail" refers to a combination of commonly used vitamins and minerals taken by patients with mitochondrial disease. There are many different types of mitochondrial diseases, which may be genetic or acquired. DNA mutations result in mitochondrial dysfunction, which impairs the ability of the body to convert food into energy. Although there is no cure for mitochondrial disease, many patients respond well to dietary supplementation."
MitoAction has a great explanation on its blog that can be found at this link: The Mito Cocktail Explained I think this is a good article that will help to gain a basic understanding of what the Mito Cocktail is.