Every100g of dehydrated onion stems contains calories1268kJ, 9.7g of water, 6.3g of protein, 0.4g of fat, 68.6g of sugar, 3.6g of ash and 2 10 of carotene. Nicotinic acid 3.0 mg, vitamin C 89 mg, potassium 2 1 mg, sodium 44.9 mg, calcium 49 mg, magnesium 9 mg, iron 22 1 1 mg, manganese 0.63 mg, zinc 2.05 mg, copper 2.33 mg and phosphorus1mg.

Onion is rich in vitamins and minerals.

Functional action

1. Onion contains volatile oil with pungent smell. When used in cooking, it can remove fishy smell in greasy dishes, produce special aroma, secrete digestive juice and stimulate appetite.

2. Onion also contains "prostaglandin A", which has the effects of relaxing small blood vessels, promoting blood circulation, improving the function of nervous system, helping to prevent dizziness caused by rising blood pressure, keeping the brain flexible, and having certain effects on preventing cardiovascular diseases and senile dementia.

3. The volatile capsaicin contained in shallots has a strong bactericidal ability. When the capsaicin is excreted through sweat glands, respiratory tract and urinary system, it can slightly stimulate the secretion of related glands, and play the role of sweating, expectoration and diuresis, thus improving the body's resistance and preventing respiratory infectious diseases.

4. People who often eat shallots, even if they are fat and fat, have no higher cholesterol and strong physique.

5. Onion contains trace element selenium, and can reduce the nitrite content in gastric juice, which has a certain effect on preventing gastric cancer and various cancers.

6. Chinese medicine believes that shallots can release, detoxify and kill insects. Indications: common cold, abdominal pain due to yin cold, constipation, dysentery, sore and carbuncle, abdominal pain due to insect accumulation.