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| - Last Updated on July 29, 2024 by Dr Priyamvada
Quick Fact
A message doing rounds on social media claims that onions become poisonous when left cut overnight. Because of this reason, one should not consume onions left outside. We investigated and found that the viral post is false.
The Claim
The viral post on social media claims that it is dangerous to leave a cut onion and try to consume it the following day. The post reads, “Please remember it is dangerous to cut an onion and try to use it to cook the next day. It becomes highly poisonous for even a single night and creates toxic bacteria which may cause adverse stomach infections because of excess bile secretions and even food poisoning“
Fact Check
What does the National Onion Association say about cut onion?
We searched appropriate keywords on Google. Our investigation found that the message is plaguing the internet since ages. We further searched and found a report on the official website of National Onion Association. According to National Onion Association, the claim is not scientifically proven.
In fact, the National Onion Association has also issued a letter to consumers about cut onion claims. The letter states that information circulated online is false.
Do onions become poisonous when left cut overnight?
No, onions do not become poisonous when left cut overnight. There is no research supporting this claim, especially considering that onions contain very little protein, and foods prone to bacterial growth generally have higher protein content. It is important to remove dirt from onions to prevent contamination or listeriosis, and they should be chopped on a clean cutting board.
To avoid cross-contamination, do not cut onions on the same board as raw poultry or meat. Onions should be stored properly in a container to prevent moisture and mold issues. When handled correctly, cut onions can be stored in the refrigerator in a sealed container for up to seven days.
We interviewed Dr Swati Dave, PhD in Food and Nutrition, for her expert opinion on cut onions. She says, “Cut onions are not inherently poisonous. However, it’s crucial to handle and store them correctly to prevent bacterial contamination. Always chop onions on a clean cutting board, avoid cross-contamination with raw meat, and store them in a sealed container in the refrigerator. When stored properly, cut onions can be safely used within seven days.”
According to Kajal Gupta, Dietitian and a part of THIP’s Review Team, “Onions have a lot of anti-bacterial properties and have multiple health benefits. They do not attract bacteria, store it and then harm your body anyone. This type of claims are absolutely false”
What are the benefits of eating onions?
Onions provide several health benefits backed by scientific evidence. They are rich in antioxidants, particularly quercetin, which helps combat oxidative stress and inflammation. Studies have shown that onions can support heart health by reducing cholesterol levels and blood pressure. Their high fiber content aids in digestion and promotes gut health. Onions also have potential blood sugar-regulating effects, making them beneficial for managing diabetes. Additionally, some research suggests that the bioactive compounds in onions may have anti-cancer properties, though more studies are needed to confirm this. There are also viral claims like onions for dissolving gallstones, onions as an anti wrinkle agent or onions for hair growth. Reinstating the fact that, onions are one of the most popular ingredient for home remedies, even if it lacks strong scientific backing as of now.
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