Alzheimer's is a brain disease which is characterised by decline in memory, thinking and reasoning skills. Alzheimer's is not a normal part of aging and it worsens over time. Alzheimer's is a progressive disease, where dementia symptoms slowly worsen over years.

It accounts for 60-80% of dementia cases, making it the most likely cause of dementia. It typically affects aged persons, with the risk dramatically rising beyond 65 years

Alzheimer's disease is caused by the abnormal build-up of proteins in and around brain cells. One of the proteins involved is called amyloid, deposits of which form plaques around brain cells. The other protein is called tau, deposits of which form tangles within brain cells.

Although it's not known exactly what causes this process to begin, scientists now kno

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