
Common onion (Allium cepa) is a fundamental spice. It is indispensable in the kitchen when preparing meals. Its home is in Western Asia – Afghanistan, Pakistan, and Iran, where it has been cultivated for over four thousand years before our era.
The quality and intensity of onion flavor depend on the content of sulfur compounds in volatile oils (such as alliin, allicin). Volatile sulfur compounds cause irritation to the mucous membranes and tearing. Onions contain a range of important vitamins, minerals and their salts, such as sulfur, phosphorus, calcium, iron, zinc, manganese, iodine, sodium, potassium, magnesium, calcium, provitamin A, vitamins B1, B2, B3, and vitamin C. Onion juice contains phytoncides, substances with antibiotic effects. Mixed with honey, it is used for colds and sore throats. The green tops are characterized by a high content of provitamin A.