Because onions are small and their tissues leave little or no trace, there is no conclusive opinion about the exact location and time of their birth. Many archaeologists, botanists, and food historians believe onions originated in central Asia. Other research suggests onions were first grown in Iran and West Pakistan.
It is presumed our predecessors discovered and started eating wild onions very early – long before farming or even writing was invented. Very likely, this humble vegetable was a staple in the prehistoric diet.
Most researchers agree the onion has been cultivated for 5000 years or more. Since onions grew wild in various regions, they were probably consumed for thousands of years and domesticated simultaneously all over the world. Onions may be one of the earliest cultivated crops because they were less perishable than other foods of the time, were transportable, were easy to grow, and could be grown in a variety of soils and climates. In addition, the onion was useful for sustaining human life. Onions prevented thirst and could be dried and preserved for later consumption when food might be scarce. While the place and time of the onion’s origin is still a mystery, many documents from very early times describe its importance as a food and its use in art, medicine, and mummification.
Onions grew in Chinese gardens as early as 5000 years ago and they are referenced in some of the oldest Vedic writings from India. In Egypt, onions can be traced back to 3500 B.C. There is evidence that the Sumerians were growing onions as early as 2500 B.C. One Sumerian text dated to about 2500 B.C. tells of someone plowing over the city governor’s onion patch.
In Egypt, onions were considered to be an object of worship. The onion symbolized eternity to the Egyptians who buried onions along with their Pharaohs. The Egyptians saw eternal life in the anatomy of the onion because of its circle-within-a-circle structure. Paintings of onions appear on the inner walls of the pyramids and in the tombs of both the Old Kingdom and the New Kingdom. The onion is mentioned as a funeral offering, and depicted on the banquet tables of the great feasts –both large, peeled onions and slender, immature ones. They were shown upon the altars of the gods.
Frequently, Egyptian priests are pictured holding onions in his hand or covering an altar with a bundle of their leaves or roots. In mummies, onions have frequently been found in the pelvic regions of the body, in the thorax, flattened against the ears, and in front of the collapsed eyes. Flowering onions have been found on the chest, and onions have been found attached to the soles of the feet and along the legs. King Ramses IV, who died in 1160 B.C., was entombed with onions in his eye sockets.
Some Egyptologists theorize that onions may have been used because it was believed that their strong scent and/or magical powers would prompt the dead to breathe again. Other Egyptologists believe it was because onions were known for their strong antiseptic qualities, which construed as magical, would be handy in the afterlife.
Onions were eaten by the Israelites in the Bible. In Numbers 11:5, the children of Israel lament the meager desert diet enforced by the Exodus: “We remember the fish, which we did eat in Egypt freely, the cucumbers and the melons and the leeks and the onions and the garlic.”
In India as early as the sixth century B.C., the famous medical treatise Charaka – Sanhita celebrates the onion as medicine – a diuretic, good for digestion, the heart, the eyes, and the joints.
Likewise, Dioscorides, a Greek physician in first century A.D., noted several medicinal uses of onions. The Greeks used onions to fortify athletes for the Olympic Games. Before competition, athletes would consume pounds of onions, drink onion juice, and rub onions on their bodies.
The Romans ate onions regularly and carried them on journeys to their provinces in England and Germany. Pliny the Elder, Roman’s keen-eyed observer, wrote of Pompeii’s onions and cabbages. Before he was overcome and killed by the volcano’s heat and fumes, Pliny the Elder catalogued the Roman beliefs about the efficacy of the onion to cure vision, induce sleep, heal mouth sores, dog bites, toothaches, dysentery, and lumbago. Excavators of the doomed city would later find gardens where, just as Pliny had said, onions had grown. The bulbs had left behind telltale cavities in the ground. The Roman gourmet Apicius, credited with writing one of the first cookbooks (which dates to the eighth and ninth centuries A.D.), included many references to onions.
By the Middle Ages, the three main vegetables of European cuisine were beans, cabbage, and onions. In addition to serving as a food for both the poor and the wealthy, onions were prescribed to alleviate headaches, snakebites, and hair loss. They were also used as rent payments and wedding gifts.
Later, the first Pilgrims brought onions with them on the Mayflower. However, they found that strains of wild onions already grew throughout North America. Native American Indians used wild onions in a variety of ways, eating them raw or cooked, as a seasoning or as a vegetable. Such onions were also used in syrups, as poultices, as an ingredient in dyes, and even as toys. According to diaries of colonists, bulb onions were planted as soon as the Pilgrim fathers could clear the land in 1648. - National Onion Association
Onion phyto-chemical compounds allium and Allyl disulphide convert to allicin by enzymatic reaction when the bulb disturbed (crushing, cutting etc). Studies have shown that these compounds have anti-mutagenic (protects from cancers) and anti-diabetic properties (helps lower blood sugar levels in diabetics). - Nutrition & You
Human studies have shown that onion can help increase our bone density and may be of special benefit to women of menopausal age who are experiencing loss of bone density. In addition, there is evidence that women who have passed the age of menopause may be able to lower their risk of hip fracture through frequent consumption of onions. "Frequent" in this context means onion consumption on a daily basis. In this research on bone density in older women, very sporadic eating of onion (once a month or less) did not provide much benefit. That finding, of course, was very expected. But less expected was the finding that it took daily consumption of onion to show robust benefits for bone density. - Worlds Healthiest Foods
The World Health Organization (WHO) supports the use of onions for the treatment of poor appetite and to prevent atherosclerosis. In addition, onion extracts are recognized by WHO for providing relief in the treatment of coughs and colds, asthma and bronchitis. Onions are known to decrease bronchial spasms. An onion extract was found to decrease allergy-induced bronchial constriction in asthma patients. - Vegetable Nutrition Info
The onion is the richest dietary source of quercitin, a potent antioxidant (also in shallots, yellow and red onions only but not in white onions), which is specifically linked to inhibiting human stomach cancer. - Food Healing Power
Onions are said to increase the urge for healthy sexual life. One table spoon of onion juice along with spoonful of ginger juice, taken trice a day can boost the libido and sex drive. - Organic Facts