People should not feel powerless because there are steps individuals can take to ward off dementia, the Alzheimer's Society said today.
A spokesperson for the Alzheimer's Society said: "You can do things to reduce your chances of getting Alzheimer's disease through diet and exercise. There are other factors too; things like making sure you don't smoke and only drinking in moderation.
"Also engaging in social activity can also help. It's really important that people do something to combat dementia. It's all about being a bit health conscious really."
Eating vegetables, oily fish and having the occasional glass of wine with your meal was advisable, she said.
Research has shown that the Mediterranean diet, which is rich in essential oils and antioxidants, reduces one's risk of developing dementia.
By 2025, one million people in the UK will have dementia, according to a report by LSE and King's College London with the Alzheimer's society.