In mice trials, scientists have shown that testosterone treatment may help prevent the progression of Alzheimer's Disease (AD).

The mice with lowered testosterone showed increases in levels of the protein beta-amyloid, which has been widely implicated as playing a role in the development of Alzheimer's disease. They also showed signs of behavioral impairment.
The mice that were given testosterone showed reduced accumulation of beta-amyloid and less behavioral impairment.

The scientists will next look at long term effects of testosterone therapy are in aging men.

Source: Univ of Southern California