Sugar can cause brain damage, claim scientists (but salmon reverses it)

 Fructose is found in high quantities in soft drinks 

•  Telegraph Food  
27 APRIL 2016 • 

Bad news for people with a sweet tooth - a new study suggests that sugar can damage the brain.

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Researchers at the University of California in Los Angeles found that fructose - a type of sugar naturally found in fruits and vegetables, but also present in soft drinks and sweets - damages brain cells and can lead to a wide range of diseases, from diabetes and heart disease to Alzheimer's and ADH.

The scientists fed a group of rats for six weeks with fructose-spiked water (the equivalent to about a litre of soft drinks a day for humans). Then they put them in a maze, alongside rats which had drank only water. The rats which had consumed fructose took twice as long to navigate the maze as the water-only group, despite the same level of training - suggesting that their memories had been impaired.

The study suggests that fructose damages brain cells and can lead to a wide variety of diseases CREDIT: ALAMY

There was however one positive outcome of the experiment:  an omega-3 fatty acid called  docosahexaenoic acid, or DHA, appeared to reverse the dangerous changes produced by fructose.

A third group of rats which were fed a flaxseed-oil extract rich in omega-3s as well as the fructose water managed to navigate the maze  almost as quickly as the water-only group.

Salmon is very high in DHA CREDIT: ALAMY

DHa is found naturally in fish (especially salmon), nuts, and certain vegetables.

"DHA changes not just one or two genes; it seems to push the entire gene pattern back to normal, which is remarkable," said Xia Yang, a senior author of the study.