Modifying 12 factors could prevent 40% of dementia cases, including excessive alcohol intake, air pollution exposure, hypertension, obesity, smoking, social isolation, physical inactivity, and diabetes.  

In a review of 60 studies, overweight or obese men were found to have low semen quality, including low semen volume, sperm count and concentration, sperm vitality, total motility, and normal morphology.

Several studies have advanced on blood testing for Alzheimer's disease using the protein p-tau217, whichis increased seven-fold in AD and accumulates in the brain up to 20 years before symptoms.

Mice with amyloid-beta plaques (indicative of Alzheimer's disease) had impaired synaptic plasticity, until the addition of the "love hormone" oxytocin, which reversed the effects of amyloid-beta.