Researchers show in a mouse model that IgA antibodies specifically limit the fitness of harmless gut bacteria at several levels, which enables the immune system to fine-tune intestinal microbial balance.

People who maintained optimal blood pressure over a 12-year period had brains that were at least six months younger than their actual age.

A fine particulate found in air polluted cities is linked to poor cognitive health and memory.

People with a stronger sense of purpose in life reported that their memories were more accessible, coherent and vivid than participants with less purpose.