Hey, do you like Onions?  They are one of my favorite vegetables.
Onions are very good. I love their close relatives garlic more though.
Onions have many health benefits including Vitamin C and potassium.  What about Garlic?
It's been used as a traditional medicine in China though I'm not sure how beneficial it really is.
Interesting.  I know Onions have been used as an anti inflammatory for centuries. 
That is a good point. Though its actual effectiveness has never been proven.
A powerful compound called quercetin in onions is known to play a significant role in preventing cancer.
Well there's lots of different cancers so it's hard to prove exactly how effective any one medicine is.