Many foods containing selenium naturally contain the natural mineral known to bepromotes cognition. Now, in a new study, scientists wanted to find out whether selenium could reverse memory loss in aging brains and prevent strokes. Selenium is an essential trace element that is absorbed from soil and water and is found in foods such as grains, meat and nuts. The highest levels are found in Brazil nuts.
Supplements and foods with selenium against neurodegeneration
According to the study authors, studies on the effects of exercise on the aging brain have shown that levels of a key protein for the transport of selenium in the blood are increased by physical activity. In addition, researchers have known for 20 years that exercise can create new neurons in the brain. However, the exact mechanism was not yet known. Therefore, the research team investigated whether selenium supplements could mimic the effects of exercise. The animal models studied showed that such supplementation could increase the formation of neurons and improve cognition in older laboratory mice. Typically, the level of new generation of neurons declines rapidly in aged mice, just as in humans. However, when the scientists gave the mice preparations containing selenium, the production of neurons increased. This could accordingly reverse the cognitive deficits observed in aging.
The scientists also tested whether selenium had an impact on the cognitive decline that sometimes occurs after a stroke. This can do thatAffect people's memory and ability to learn. They found that learning and memory deficits returned to normal in mice after a stroke when they were given selenium supplements. The new results open a new therapeutic avenue for increasing cognitive function in people who are unable to exercise due to poor health or old age. However, supplements or foods containing selenium should not be considered a complete replacement for exercise. Too much of it could cause harm, the researchers said. A balanced diet including fruits, nuts, vegetables and meat usually ensures good selenium levels.This studyshows that older people with neurological diseases such as Alzheimer's or dementia could benefit.
