One in 14 people over 65 - and one in six over 80 - have dementia, but new research in our region is hoping to combat these devastating illnesses.
Some of this work is being done at the University of Sussex where a build-up of proteins on the brain is being studied. And in this Dementia Awareness Week members of the public have been invited to see their work close up.
Andy Dickenson reports. He speaks to Andy and Janet Gumbrill, Dr Karen Marshall and Prof Louise Serpell.