Onions may stink up our kitchens, give us bad breath, and make us cry when cutting them, but despite these minor annoyances, they are actually full of healthy goodness. No kitchen is complete without a red onion. They may make you cry, but they're on your side when it comes to taste and health.
A lack of chromium-rich foods, such as onions, in diet may lead to insulin resistance and impaired blood sugar control and may increase the risk of cardiovascular disease and type 2 diabetes. Onions are a rich source of chromium, a trace mineral that can help control glucose levels. This is great news for those who suffer from insulin resistance as chromium is an essential for insulin activity in carbohydrate, fat and protein metabolism. Furthermore, there is some evidence suggesting that severe chromium deficiency may make weight loss more difficult or even cause weight gain.
Red and yellow onions are one of the best natural sources of quercetin, a bioflavonoid that is particularly well suited for scavenging free radicals. It has also been shown to reduce the risk of stomach cancer: according to one study, half an onion a day could reduce the risk of stomach cancer by 50%. It has shown promising potential for preventing and controlling the formation of intestinal polyps, suppressing the rhinoviruses that are the underlying cause of common cold, treating psoriasis, and inhibiting the replication of viruses including the herpes simplex virus that can cause cold sores. Aside from its antioxidant properties, quercetin has been found to possess cancer fighting, anti-fungal, anti-bacterial, and anti-inflammatory properties.
A study in the Journal of Agricultural and Food Chemistry found that red onions are also beneficial to overall bone health. A compound known as GPCS is responsible for this, and it does so by inhibiting cells that break down bones.
Fresh red onions reduce inflammation in the bones and throat, as well as in blood vessels. This reduces many of the symptoms of osteoporosis, asthma and even the common cold.
Onions, and other Allium species, are highly valued herbs possessing culinary and medicinal value. Some of their beneficial properties are seen after long-term usage. Onions have a universal appeal. They are safely consumed by most people. However, consuming large quantities of onions can lead to stomach distress and gastrointestinal irritation that may result in nausea and diarrhea. There are no known interactions with drugs except that they can potentiate the action of anticoagulants.
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