Onion belongs to the vegetable food, the main nutrients are energy, carbohydrates, protein, dietary fiber, fat, inorganic salts, vitamins and so on.
Onions have a certain nutritional value, onions (scallions), for example, per 100g edible portion of the onion’s caloric value is 169KJ.
Also rich in a variety of nutrients needed by the human body, 100g onion (scallion) contains 9.0g carbohydrates, 1.1g protein, 0.9g insoluble dietary fiber, 0.2g fat, 8.0mg of vitamin C, 147mg of potassium, 39mg phosphorus, 24mg of calcium.
Moderate consumption of onions can replenish the body’s nutrients, to a certain extent, to maintain normal life activities, but onion allergy to people can not eat onions.