Transplanting fecal bacteria from colon cancer patients into mice led to pre-cancerous lesions and damage to colon DNA. A pilot study in humans was done to develop a blood test based on this data.

Adipose B-cells in belly fat tend to grow as we age, reduce metabolism and increase inflammation. Normal B-cells protect from infection and contract back to normal size; aging B cells don't contract.

In women, a healthy diet was linked to a reduced risk of hearing loss. Foods high in carotenoids (like beta-carotene), folate, and omega-3 fats led to reduced hearing loss in previous studies.

Ambient and household air pollution was tied to an increase in a marker of atherosclerosis (the narrowing and weakening of blood vessels), which is a precursor to cardiovascular disease.