Dementia and Alzheimer's Disease are on the rise in the US and across the globe.
Researchers at UCLA estimate nearly 47 million Americans over the age of 30 have pre-clinical Alzheimer's Disease.
That means they have a build up of brain plaques linked to the disease, but may never develop any symptoms.
They project 15 million Americans will have some form of cognitive impairment by 2060.
A separate study from the World Health Organization expects the number of people with Dementia to triple worldwide from 50 million to 152 million by 2050.