Medicinal properties and health benefits:
Evidence suggests that onions are effective against colds, heart disease, diabetes, osteoporosis, and other diseases.

Onions contain compounds that fight inflammation, cholesterol, cancer, and oxidation, such as quercetin, which is a flavonoid.

Onions are used in many regions of the world to treat pimples and ulcers, and in alternative medicine, onions are used to treat colds and hay fever.

Onions, like garlic, are of the Allium family and both are rich in powerful sulfur-containing compounds responsible for their pungent odor and many of their health effects.

It is one of the plants rich in water and contains alkaline substances. It is considered one of the diuretic plants that prevent the formation of stones and a laxative that is useful for smoothing the intestines due to the fiber it contains. It is also rich in vitamin C and contains a little of vitamins A and B. It also contains important mineral salts necessary for building the body, such as Sodium, calcium, phosphorus, and magnesium.

Onions contain allyl propyl disulfide, which is very rich in chromium, which helps cells respond to insulin, in addition to vitamin C (C) and many flavonoids, as previously mentioned, the most important of which is quercetin.

Nutritional information:
According to the US Department of Agriculture, each medium-sized onion (110g) contains the following nutritional information:
Calories: 44
Fat: 0.11
Saturated fat: 0
Carbohydrates: 10.27
Fiber: 1.9
Proteins: 1.21
Cholesterol: 0