The brain runs on energy. Every thought, memory, or emotion sparks countless signals between nerve cells. That communication demands a steady, powerful fuel supply. Without it, the system breaks down.

Alzheimer's nerve cells manifest a decrease in the connections between nerve cells, called synapses, shown here within the blue circles. Half the synapse is marked with a red fluorescent stain and the ...

If you took biochemistry classes, chances are good you remember memorizing the Krebs cycle, a well-known metabolic pathway in which sugars are converted through a series of steps to generate ATP, a ...