Eat More Red Onions: It Inhibits Cancer Cells, Stops Nosebleeds And Protects The Heart (Page 3 ) | November 10, 2025

In fact, onions contain more polyphenols than garlic or leeks. These polyphenols also play a huge role in increasing the ratio of  bacteria —which we now understand from studies to be significant for your overall health, weight, and immune system.

The Power of Onions

One of the major health components in onions is the flavonied . Studies show that quercetin is not only a powerful antioxidant with significant anti-inflammatory properties, but it can also help prevent and treat chronic diseases such as heart disease and even cancer.