Dr Tommy Wood: The leading neuroscientist on how to reduce your risk of dementia to live healthier and happier for longer

There are few things people fear, especially once they enter middle-age, as much as major cognitive decline. Neurodegenerative diseases, such as dementia, affect more than 55 million people worldwide, with 10 million new cases every year, according to the World Health Organisation.

Alzheimer’s disease is the most common form of dementia, accounting for between 60% to 70% of all cases – and dementia is the seventh leading cause of death globally and one of the major causes of disability and dependency amongst older people.

But it’s not all bad news because certain lifestyle interventions can significantly reduce your risk of severe cognitive decline.

For example, there’s strong evidence to suggest - and most experts agree - that exercise, good nutrition and learning new skills help mitigate your risk.

One factor you might n ...