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Why is sugar bad for our memory?
Thanks for asking. We're well aware of its negative impact on our waistlines and heart health, but sugar also takes a toll on our brains.
And it's not just found in the obvious sources like refined sugar from sugarcane or sugar beet.
It's lurking in fruits as fructose and in dairy as lactose.
Back in 2015, the World Health Organization released guidelines recommending adults and children reduce their daily intake of free sugars to less than 10 % of their total energy intake to remain at a healthy weight.
The agency also said additional benefits could be yielded by going below 5%.
That translates to around 25 grams, or 6 teaspoons, of free sugars per day for a person consuming 2 ,000 calories.
Why do we crave sugar so much despite the associated health risks?
Writing on theconversation .com in 2019, renowned neuroscientist Amy Reichelt explained that we're actually hardwired to find sweet foods irresistible due to evolution.
Sweet treats provide a quick energy boost.
While our bodies can interpret bitter or sour tastes as potentially harmful substances, Our brain's reward system kicks in when we indulge in sugary delights, releasing dopamine to signal pleasure, which encourages us to seek out more sugar.
There's been plenty of scientific research on that theme, so let's talk about a few examples.
Back in 2012, researchers at UCLA in the United States found that a diet high in fructose slows down brain function, affecting memory and learning abilities in rats.
They studied two groups of rats over a six -week period, with both groups being fed a fructose solution as drinking water.
One group received omega -3 fatty acids, which helped counteract some of the fructose impact, but the other group showed damaged synapses and disrupted communication between brain cells, as well as developing insulin resistance.
This resistance interferes with the body's ability to regulate blood sugar levels.
The suggestion was that human brains could also be affected in the same way.
Meanwhile a 2021 study published in the Journal of Prevention of Alzheimer's Disease uncovered a link between sugar consumption and the risk of developing Alzheimer's and all types of dementia or of having a stroke.
The study tracked 1 ,865 people over a period of 16 years and looked at the impact of sugar in beverages in particular.
Finally, a 2014 study from Emory University also looked at the effects of a high fructose diet on rats, specifically relating to anxiety and depression.
It found that adolescents could be subject to long -term changes in metabolism and behaviour, whereas adults were less affected.
At the time, Constance Harrell, one of the students behind the study, was quoted as saying, Our results offer new insights into the ways in which diet can alter brain health and may lead to important implications for adolescent nutrition and development.
There you have it. Now you know why sugar is bad for your memory.
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