Researchers link levels of a protein that signals poor heart health to increased risk of dementia. Photo: Alan Porritt/AAP PHOTOS

Middle-aged adults with biological signs of poor heart health are more likely to go on to be diagnosed with dementia in later life, according to a new study.

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These biological signals could be evident up to 25 years before a dementia diagnosis, researchers found.

Experts said people should focus on maintaining good heart health throughout their lives to reduce their risk of dementia later on through being active, managing blood pressure and cholesterol le

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