Polychlorinated biphenyls (PCBs) are chemicals used in industrial materials. PCBs have been found to damage astrocyte function in the brains of mice, which are crucial to neuron and brain function.

Overweight men who exercised before breakfast had double the amount of fat burn compared exercising after eating. Fasting led to lower insulin levels, thus more body fat was used as fuel.

A study on mice showed cellular differences in how memories are stored in old age compared to young adulthood. In older mice, memories were laid down in a different mechanism compared to younger mice.

Mitochondrial dysfunction is a new theory proposed to be responsible for Alzheimer's disease. These metabolic defects occurred even before amyloid plaques were detected in this study on worms.