Dementia blood test could pose 'ethical' challenges

A blood test that could predict the onset of Alzheimer's poses ethical challenges, an expert from the Alzheimer's Society has said.

A new study published in the journal Nature Medicine found that changes in the blood may predict whether someone will develop Alzheimer's.

A new blood test could predict whether someone will develop dementia, research suggests. Credit: PA Wire

"Having such a test would be an interesting development, but it also throws up ethical considerations," Dr Doug Brown, the charity's director of research and development, said.

"If this does develop in the future people must be given a choice about whether they would want to know, and fully understand the implications.

Dr Brown said there needed to be larger studies with different populations before it could be turned into a blood test for Alzheimer's disease.

Read: Blood test breakthrough in Alzheimer's diagnosis

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Scientists hail breakthrough in 'Alzheimer's blood test'

Scientists have developed a new blood test which could detect if a healthy person will develop Alzheimer's disease over the next three years. Changes in the blood may signify the early stages of the disease, researchers said in Nature Medicine.