Brain aging and DHA

 
 
 

Lower levels (in comparison with higher levels) of DHA in red blood cells of people free of dementia are associated with smaller brain volume and a pattern of cognitive impairment similar to the persons who have dementia. This is the conclusion reached by a study with 1575 dementia-free participants, from 58 to 76 years of age, in which they had to perform cognitive tests (to measure brain aging) and to undergo a magnetic resonance imaging (in order to measure the volume of the brain).

The cognitive tests assessed verbal memory, visuospatial memory, abstract reasoning skills, and attention and executive function (planning, organizing, remembering details and managing time and space), all of them cognitive facets in which poor performance is associated with an increased risk of developing Alzheimer disease. People with the lowest levels of DHA in red blood cells had lower total brain volume (with measurements representing a change equivalent to approximately 2 years of structural brain aging) and lower scores on tests of visual memory, executive function and abstract thinking.

 
 

EPA, DHA and brain volume

Our brain is the largest among the mammals. Yes, whales and elephants have larger brains in absolute terms, but the human brain is larger than any other in relation to body size. T[...]