According to studies conducted at the University of Maryland Medical Center, quercetin is also shown to help prevent the release of histamine—chemical in your body that causes allergic reactions, which makes onions the perfect natural antihistamines (1).
In addition, onions are shown to:
1. Inhibit Cancer Cell Growth
According to the National Onion Association, onions are considered a dietary anti-carcinogen.
“In a review on the effects of quercetin…persons in the highest consumption category versus the lowest had a 50 percent reduced risk of cancers of the stomach and alimentary and respiratory tracts.” (2)
In addition, another study showed that onions are full of organic sulfurs, which are known to inhibit a variety of cancers (3).
2. Regulate Diabetes
Research suggests that onion extract can lower high blood sugar and improve cholesterol levels.
3. Prevent Ulcers
Eating onions may prevent gastric ulcers by scavenging free radicals and by preventing the growth of Heliobacter pylor (H-pylori)—an ulcer-forming microorganism.