Watching another person show a visible dislike of vegetables can influence your own thoughts on the healthy snacks.
Watching others eat vegetables can influence your own thoughts
A team from Aston University in Birmingham investigated whether the facial expressions of a person eating something had an impact on somebody else looking on and found that those who grimaced when eating their greens left an impression on others.
Dr. Katie Edwards, lead author of the study, said: "We show that watching others eating a raw vegetable with a negative facial expression reduces adult women's liking of that vegetable, but not their desire to eat it.
"This highlights the power of observing food dislike on adults' eating behaviour."
The findings can also apply to children, meaning parents should be wary of their facial expressions if they want their kids to get their five-a-day.
Dr. Edwards said: "If a child sees their parent showing disgust while eating vegetables, this could have negative consequences on children's vegetable acceptance."