Onions, scientifically known as Allium cepa, are one of the most widely cultivated and consumed vegetables in the world. Belonging to the Amaryllidaceae family, they are closely related to garlic, leeks, and chives. Onions are valued for their distinctive pungent flavor and aroma, which become milder and slightly sweet when cooked. They are rich in nutrients such as vitamin C, vitamin B6, potassium, and antioxidants, particularly compounds like quercetin that may help reduce inflammation. Widely used in cuisines across cultures, onions can be eaten raw, sautéed, caramelized, or pickled, making them a versatile ingredient in dishes ranging from salads to curries. In addition to their culinary uses, onions have been traditionally used in home remedies due to their antibacterial properties and potential health benefits.