MIT researchers have developed a new fuel cell that could be used to power brain implants in coming years [1]. Just like human cells, the fuel cells run on glucose, which is the most common sugar in nature and in the human body. Human cells derive energy from glucose through a process called oxidation — a part of metabolism — that takes electrons from the glucose and passes those electrons from enzyme to enzyme in the cell, generating the energy molecule adenosine triphosphate (ATP).