2.1M views · 109K reactions | Charlamagne Tha God runs through the official list of dementia symptoms to see if Trump is losing his marbles | The Daily Show | Facebook

At what age do men develop dementia? For most people with Alzheimer's — those who have the late-onset variety — symptoms first appear in their mid-60s or later. When the disease develops before age 65, it's considered early-onset Alzheimer's, which can begin as early as a person's 30s, although this is rare. What is the life expectancy of a man with dementia? The average life expectancy figures for the most common types of dementia are as follows: Alzheimer's disease – around eight to 10 years.