A Canadian study found older adults who exercised rarely and ate high levels of salt were at greater risk of losing brain function.
Another American study looking at the effects of salt on mice, found eating a lot of salt caused memory problems.
Commenting on this American study, Alzheimer’s Research UK said: “Despite only accounting for around 2% of body weight, the human brain requires approximately 15% of the body’s blood supply.
“Changes to the blood supply can have wide-reaching effects, and have been linked to changes in the brains of people with dementia.”
Dr Sara Imarisio, Head of Research at Alzheimer’s Research UK, added: “While this research was in mice, the findings highlight the importance of cutting out excess salt in our diets, as well as identifying possible new avenues in the search for treatments to help those with memory problems or dementia.
“Eating a balanced diet, not smoking, only drinking in moderation, staying mentally and physically active, and controlling blood pressure and cholesterol can all help to maintain brain health as we age.”