A recent US report called ‘Physical Activity Interventions in Preventing Cognitive Decline and Alzheimer-Type Dementia’ reviewed previous significant trials that studied the effect of exercise, vitamin supplements, cognitive training and other ‘wellness regimes’ to determine if dementia can be delayed in people.

The main aim of the study was to review past research on the prevention of dementia and see whether there were any interventions that could delay the onset of the condition.

The study concluded that none of these interventions could prevent dementia in later life. But, researchers said that brain training and lifestyle improvements such as eating a good diet, staying cognitively active and engaging socially, do help.