High levels of cadmium in the body due to smoking may increase the risk of thinking and memory problems. This was shown in a study published in the journal. Neurology.
Scientists analyzed data from 2,000 people, with an average age of 64, who had no problems with thinking or memory. Urine cadmium levels were checked at baseline. Participants underwent reasoning and memory tests annually and were followed for an average of 10 years.
During that time, 195 people developed cognitive impairment. When the researchers analyzed data from the group as a whole, they found no link between cadmium levels and poor brain function. But when they looked at black and white participants separately, they found that whites with high cadmium levels were twice as likely to have cognitive impairment. Overall, 9.2 percent of people with high cadmium levels developed thinking and memory problems, while 6.7 percent of people with low cadmium levels developed problems.
The researchers also took into account other risk factors for impaired memory and thinking: sedentary lifestyle, alcohol use and low education level.
One possible explanation for the difference between white and black people could be smoking. The researchers found that white people with the highest cadmium levels had a smoking index twice as high as black people with the highest cadmium levels.
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Source: Gazeta
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