Researchers at Yale University have scanned brains and the results are alarming!
Scans of the human brain have shown that fructose, a monosaccharide found in everything from fruit to chicken nuggets, can trigger brain function that leads to overeating.
So even though you may be full - this ingredient will trick your brain into thinking you aren't hungry, yet!
It's tricky, tricky, tricky!
Here's what one researcher said: