Health : Things You Need To Know About Onions

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Onions are part of the allium family of vegetables and herbs, which also includes chives, garlic, scallions, and leeks. Allium vegetables have been cultivated for centuries for their characteristic, pungent flavors and for their medicinal properties.

Onions can vary in size, shape, color, and flavor. The most common types are red, yellow, and white onions. Flavors can be sweet and juicy to sharp, spicy, and pungent, often depending on the season in which they are grown and consumed.

It is estimated that 105 billion pounds of onions are harvested each year, worldwide. According to the Food and Agriculture Organization of the United Nations (FAO), China is the biggest producer.

The possible health benefits of consuming onions include lowering the risk of several types of cancer, improving mood, and maintaining the health of skin and hair.

Fast facts on onions:

Onions have been used as food for thousands of years; in ancient Egypt, they were worshiped and used in burial rituals.
Onions have many possible health benefits including reducing the risk of obesity, heart disease, and cancer.
They are high in vitamins, minerals, and antioxidants.
Incorporating onions into a diet is very simple, with a versatile range of ways they can be prepared and cooked in regular foods.

Benefits

red and white onions
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Onions have been praised for their flavor and health benefits for thousands of years.
Consuming fruits and vegetables of all kinds has long been associated with a reduced risk of many lifestyle-related health conditions.

Many studies have suggested that increasing consumption of plant foods like onions decreases the risk of overall mortality, diabetes, and heart disease.

Plant foods also promote a healthful complexion, hair, increased energy, and overall lower weight.

Cancer

Allium vegetables have been studied extensively in relation to cancer, especially stomach and colorectal cancers. Their beneficial and preventive effects are likely due in part to their rich organosulfur compounds.

The exact mechanism by which these compounds inhibit cancer is unknown, but hypotheses include the inhibition of tumor growth and mutagenesis, and prevention of free radical formation. Onions are also a source of the strong antioxidant vitamin C that helps to combat the formation of free radicals known to cause cancer.

Colon cancer

High fiber intake from all fruits and vegetables are associated with a lowered risk of colorectal cancer. One study showed that consuming greater than 7 servingsTrusted Source of onions per week was associated with a decrease in colorectal cancer.

Prostate cancer

In a paper, published by the Journal of the National Cancer InstituteTrusted Source, researchers used a population-based, case-controlled study to investigate the relationship between allium vegetable intake and prostate cancer. They found that men with the highest intake of allium vegetables had the lowest risk of prostate cancer.

Esophageal and stomach cancer

Frequent intake of allium vegetables has been shown to reduce the risk of esophageal and stomach cancer. Several survey-based human studiesTrusted Source have demonstrated the potential protective effects of consuming alliums, as well as reports of tumor inhibition of allium compounds in animal experiments.

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Sleep and mood

Folate, found in onions, might help reduce depression. Homocysteine prevents blood and other nutrients from reaching the brain, and folate prevents this chemical from building up. Excess homocysteine also interferes with the production of the feel-good hormones serotonin, dopamine, and norepinephrine, which regulate not only mood, but also sleep and appetite.

Skin and hair

Onions are high in vitamin C, which is needed for the building and maintenance of collagen, which provides structure to skin and hair.

Nutrition

Onions are a nutrient-dense food, meaning that while they are low in calories, they are high in beneficial nutrients like vitamins, minerals, and antioxidants.

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One cup of chopped onion contains approximately 64 calories, 15 grams of carbohydrate, 0 grams of fat, 0 grams of cholesterol, 3 grams of fiber, 7 grams of sugar, 2 grams of protein, and 10 percent or more of the daily value for vitamin C, vitamin B-6, and manganese.

Onions also contain small amounts of calcium, iron, folate, magnesium, phosphorus, and potassium, and the antioxidants quercetin and sulfur.

Risks

The risks of onion consumption are minimal. However, as with all food that may otherwise be healthful, overconsumption comes with potential health risks. Allergy sufferers may have a problem consuming onions, too.

It is the total diet or overall eating pattern that is most important in disease prevention and achieving good health. It is best to eat a diet with variety than to concentrate on individual foods as the key to good health.




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