From the research, they can find that purple onions have much quercetin, a kind of flavonoids, which can destroy or obstruct the growth of the colorectal cancer cells. Besides, the purple onions have much anthocyanin which is the pigment in purple or red vegetables and fruits. The anthocyanin can aliment the quercetin to obstruct and destroy the cancer cells. So, the easy way to protect and cure the colorectal cancer is that you should eat both fresh and cooked purple onions.
Read more The Advantages of "Onions" You May Not Know.
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