Age is the biggest known risk factor for the development of Dementia with Lewy bodies.

We know that conditions like high blood pressure and high cholesterol are risk factors for other causes of dementia such as Alzheimer's disease. There is some evidence to suggest this may also be true for DLB. If you have concerns, you can speak to your doctor about managing these conditions.

Recent studies have found several genes linked to a higher risk of DLB, including a known risk gene for Alzheimer’s. While these discoveries help us to understand the biology of DLB, having one of these risk genes does not mean you will definitely develop the disease. There is no test available on the NHS for these genes.

For more general information about risk factors for dementia, visit our section on risk factors and prevention.

Dementia with Lewy bodies

Information in this booklet is for anyone who wants to know more about dementia with Lewy bodies (DLB). This includes people living with DLB, their carers, families and friends.


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Alzheimer’s Research UK has a wide range of information about dementia. Order booklets or download them from our online form.

This information was updated in December 2019 and is due for review in December 2021. It does not replace any advice that doctors, pharmacists or nurses may give you. Please contact us if you would like a version with references.

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Dementia Research Infoline

Want to know more about current research? Keen to get involved in research projects?

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0300 111 5 111