We’ve all driven through our local fast food joint from time to time, especially on those late nights when we’re just too tired to cook dinner. Sounds pretty harmless, right? Think again.

According to a study published in the Biological Psychiatry Journal and conducted by researchers at Louisiana State University, those with a diet consisting of mostly high-fat foods had an increased risk for depression and other psychiatric disorders.

Eating too many fatty foods can lead to obesity, which can have a huge effect on the way your gut microbiota – a fancy term for the bacteria in your gut – functions from day to day. It’s important to point out that the study involved mice rather than humans.

Now, for the study itself: Non-obese, adult male mice were fed a regular diet but injected with bacteria from mice that were fed fatty foods.

What happened next?

The mice that were injected with the gut microbiome had higher anxiety levels and showed signs of dementia and repetitive behavior.

Can Eating Fast Food Make You Depressed?  was originally published on

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