An increasingly popular, although admittedly not mainstream theory – is that cancer is a metabolic disease. This article is not intended to be a comprehensive presentation of the theory but intended to serve as a basic overview to introduce you to the subject. Much like the theory that some cancers are parasitic in nature, the idea that cancer is a metabolic disease – is not widely examined or acknowledged by the mainstream medical system. Outspoken advocates in support of the theory assert that this approach is not being recognized as an effective alternative to the radiation and chemotherapies that are currently being utilized – because there is little money to be made.