They include hearing loss, smoking, and not finishing secondary education, a study says.Read more
What do hearing loss and education have to do with dementia?
It often presents in old age but there are steps you can take before then to keep your brain healthy.
Sophie Leggett has a 50% chance of developing Alzheimer's in the next few years, which is why she's taking part in research to try to find a cure.
A care home in Bradford has come up with a new way of helping some of its residents who are suffering with dementia.
In one of their corridors they've built their very own high street with a post office, tea room and a book shop.
The idea is to help people there to improve their orientation and communication skills:
A terracotta army of 200 warriors is created by young people and care home residents in Wester Ross.
The brain's wiring as never seen before.