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Australian Study: Junk Food Diet Impairs Memory and Brain Function in Just One Week

A groundbreaking Australian study reveals how just one week on a high-fat, high-sugar diet disrupts brain function, particularly memory.

The Effects of a "Western-Style" Diet

Ongoing research highlights the broader impacts of junk food beyond physical health issues like obesity. Previous studies have linked it to depression, and now, a study from Macquarie University in Sydney, published in Royal Society Open Science on February 19, 2020, demonstrates its direct toll on the brain—especially memory.

The researchers tracked 110 students aged 20 to 23, dividing them into two groups for one week. One group followed a balanced diet, while the other consumed a "Western-style" diet rich in fried foods and sugars, including hamburgers, waffles, and milkshakes.

Australian Study: Junk Food Diet Impairs Memory and Brain Function in Just One Week

Changes in the Hippocampus

Participants underwent memory tests and appetite assessments before and after meals at the start and end of the week. The results were striking: those on the junk food diet scored lower on memory tasks and reported stronger cravings for fatty, sugary foods post-meal.

The study concludes that this diet impairs the hippocampus, a key brain region for memory and appetite regulation. This leads to cognitive deficits and reduced appetite control, fostering overeating, obesity, and a harmful cycle.

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