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In some cases, consuming raw onions in excess or even in small amounts for sensitive individuals can lead to discomfort and unwanted health issues.
Onions add flavor and nutrients, but raw ones can cause discomfort for some people. (Representative Image)
Onions are among the most widely consumed vegetables in the world, valued for their strong aroma, sharp flavour and versatility in cooking. From salads and chutneys to sandwiches and curries, raw onions are a staple in countless cuisines. While they are rich in essential nutrients like vitamin C, antioxidants and plant-based compounds that support immunity and overall health, eating them raw is not always suitable for everyone. In some cases, consuming raw onions in excess or even in small amounts for sensitive individuals can lead to discomfort and unwanted health issues.
Below are five possible side effects of raw onions that you should keep in mind before adding them generously to your meals.
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Raw Onions May Trigger Migraines in Sensitive Individuals
For people who suffer from migraines, raw onions could act as a potential trigger. This is because onions contain tyramine, a naturally occurring amino acid by-product that has been linked to the onset of headaches in sensitive individuals. While not everyone will experience this reaction, those who frequently deal with migraines might notice that their symptoms worsen after consuming raw onions. Keeping track of dietary habits through a food journal can help identify whether onions are contributing to recurring headaches.
Unpleasant Breath and Lingering Odour After Consumption
One of the most well-known drawbacks of eating raw onions is the strong odour they leave behind. The vegetable is rich in sulfur-containing compounds, which not only create a pungent taste but also enter the bloodstream. These compounds are then released gradually through the lungs, which explains why brushing your teeth or using mouthwash often does little to eliminate onion breath. Natural remedies such as chewing parsley, drinking green tea or sucking on cloves may help reduce the smell, but the odour can persist for hours after eating.
Digestive Discomfort and Bloating From Raw Onions
Raw onions can be quite harsh on the digestive system, particularly for people with sensitive stomachs or conditions like irritable bowel syndrome (IBS). They contain fructans, a type of carbohydrate that ferments in the gut during digestion. This process can cause excessive gas, bloating, stomach cramps, and even diarrhoea in certain individuals. Lightly sautéing or cooking onions helps break down fructans, making them easier to digest and less likely to irritate the gastrointestinal tract.
Allergic Reactions to Onions Can Be Serious
Although onion allergies are relatively rare, they can still pose a risk for some individuals. Eating raw onions may trigger mild reactions such as itching, rashes, watery eyes, or swelling of the lips and tongue. In more severe cases, people may experience breathing difficulties or anaphylaxis, a life-threatening allergic reaction that requires immediate medical intervention. Anyone who notices recurring allergy symptoms after eating onions should consult a healthcare provider and avoid raw consumption to prevent serious complications.
Raw Onions Can Trigger Heartburn and Acid Reflux
For individuals who are prone to acid reflux or gastroesophageal reflux disease (GERD), raw onions may worsen symptoms. They are known to relax the lower esophageal sphincter—the muscle that normally prevents stomach acid from flowing back into the oesophagus. This relaxation can lead to a burning sensation in the chest, sour taste in the mouth, or general discomfort after meals. Eating onions late at night or before lying down can increase the chances of heartburn. Cooking onions can help reduce this effect, making them easier on the digestive system.
About the Author
Nishad Thaivalappil is a Lifestyle and Entertainment Journalist with almost a decade-long odyssey in the realms of movies, music, culture, food, and travel. He leads the Lifestyle desk at News18.com. Besides ha…Read More
Nishad Thaivalappil is a Lifestyle and Entertainment Journalist with almost a decade-long odyssey in the realms of movies, music, culture, food, and travel. He leads the Lifestyle desk at News18.com. Besides ha… Read More
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