Chemical accumulation

One cause of cell death is accumulation of harmful chemicals. The most famous type of chemical is the prion, a malformed protein that cannot be removed by the body and that causes normal protein to turn into prions. Prions are responsible for Mad Cow disease and similar human diseases. It is unclear how many other problems may be caused by the accumulation of other non-digestible chemicals. What is clear is that a diamond nanobot could make short work of breaking up a prion, or any other chemical that the body couldn't deal with on its own. Nanobots could go from cell to cell like a housecleaning service, absorbing and breaking down a variety of undesired chemicals.