Green onions, also known as scallions or spring onions, are a favorite ingredient in kitchens around the world. Their crisp texture and mild flavor make them perfect for salads, soups, noodles, and garnishes. However, because they grow close to the soil, they can become contaminated with bacteria, parasites, or other harmful microorganisms if they are not grown, handled, or washed properly. While headlines often exaggerate the danger by calling them "one of the dirtiest vegetables," the real issue is not the vegetable itself—it is how it is cleaned and prepared before eating.

Green onions spend much of their growing season partially buried in soil. During cultivation, they may come into contact with contaminated irrigation water, animal manure, or dirty harvesting equipment. If proper food safety practices are not followed, harmful microorganisms such as Salmonella, E. coli, Listeria, or certain parasites may contaminate the vegetables.

Unlike foods that are cooked thoroughly, raw green onions do not undergo a heating process capable of destroying many harmful microbes. As a result, eating contaminated green onions without adequate washing may increase the risk of foodborne illness. Symptoms can include nausea, vomiting, diarrhea, stomach cramps, and fever. Most healthy people recover within a few days, but young children, older adults, pregnant women, and individuals with weakened immune systems are at greater risk of serious complications.

Although parasite contamination is possible, it is relatively uncommon in countries with modern agricultural and food safety systems. More often, bacterial contamination is responsible for foodborne outbreaks linked to raw produce. That is why food safety experts emphasize proper washing rather than avoiding nutritious vegetables altogether.

The good news is that several simple precautions can significantly reduce the risk. Before preparing green onions, remove damaged outer leaves and trim away the roots. Rinse the stalks thoroughly under clean running water while gently rubbing the surface with your fingers. Because dirt often collects near the white base, pay extra attention to this area.

For recipes that do not require raw onions, cooking is another effective way to reduce many foodborne pathogens. Heat destroys most bacteria and parasites that may be present on contaminated produce. If you plan to use green onions in soups, stir-fries, or omelets, cooking provides an extra layer of protection.

Cross-contamination is another important concern. Even perfectly washed vegetables can become contaminated again if they touch raw meat, poultry, seafood, or dirty cutting boards. Always use separate utensils for raw animal products and fresh vegetables, and wash your hands thoroughly before food preparation.

Proper storage also plays a role in food safety. Refrigerate green onions promptly after purchase and avoid leaving them at room temperature for extended periods. Discard vegetables that become slimy, moldy, or develop an unpleasant odor, as these are signs of spoilage.

Despite alarming claims circulating online, green onions remain a healthy and nutritious food. They provide vitamin K, vitamin C, folate, fiber, and beneficial plant compounds that support overall health. Eliminating vegetables from your diet because of fear is unnecessary when proper food handling practices are followed.

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The most important message is simple: don't panic, but don't become careless either. Fresh produce plays an essential role in a balanced diet, yet every fruit and vegetable should be treated as a raw agricultural product that requires careful washing before consumption.

By purchasing produce from reputable sources, storing it correctly, washing it thoroughly under running water, and preventing cross-contamination in the kitchen, you can continue enjoying green onions safely. Good food hygiene protects not only you but also your family, allowing everyone to benefit from the nutritional value of fresh vegetables without unnecessary risk.

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Green Onions and Food Safety: 15 Important Things You Should Know Before Eating Them

Green onions are a familiar ingredient in countless kitchens. From Vietnamese noodle soups and spring rolls to stir-fried vegetables, omelets, salads, and grilled dishes, these flavorful vegetables add freshness, color, and aroma to everyday meals. They are inexpensive, easy to prepare, and provide several nutrients that contribute to a balanced diet.

However, like other fresh vegetables, green onions can sometimes carry harmful microorganisms from the farm to the kitchen. Soil, irrigation water, handling practices, transportation, and storage conditions can all influence their safety.

The solution is not to stop eating green onions. Instead, understanding how contamination occurs and learning a few practical food safety habits can help reduce unnecessary risks.

Here are 15 additional facts about green onions, including how to select them, wash them correctly, store them safely, recognize spoilage, and use them in everyday meals.

1. Why the White Base of Green Onions Needs Special Attention

One of the most important areas to clean when preparing green onions is the white base near the roots.

Unlike the long green leaves, which are relatively exposed, the white portion often grows partly beneath the soil. Small particles of dirt can become trapped between layers of plant tissue, particularly where the leaves overlap.