One in three people are expected to die of dementia, which kills more people than breast and prostate cancer combined. This document outlines lifestyle factors that can preserve brain function and reduce the risk of neurodegenerative diseases. It recommends adopting a Mediterranean diet rich in vegetables, fruits, whole grains and healthy fats. Fasting for 16-18 hours daily and 3 day water fasts monthly are also suggested. Other lifestyle factors that may help brain health include exercise, hydration, sleep, stress management and an anti-inflammatory diet low in sugar and processed foods.