That looks like a clickbait-style headline that’s been cut off. There’s no single medically agreed statement like “onions cause ___” in a dramatic sense.
What doctors and nutrition research actually say about onions is more balanced:
Eating onions can cause or contribute to:
- Bad breath (due to sulfur compounds)
- Gas or bloating in some people (they contain fermentable carbs called fructans)
- Eye irritation/tearing when cutting them (not from eating, but preparation)
But onions are also widely considered beneficial:
- Rich in antioxidants (like quercetin)
- May support heart health and reduce inflammation
- Can help with blood sugar control in some studies
- Provide vitamin C and fiber
So if that headline was trying to scare you, it’s oversimplifying. Onions are generally healthy for most people—just not perfect for everyone’s digestion or breath.
If you want, paste the full headline and I’ll decode what it was actually claiming.
