USDA Warns: Don't Eat Mouldy Onions
Consuming them can trigger allergic reactions or respiratory problems, with severe cases possible if mould growth is extensive.

Black spots on onions are caused by mould, a type of microscopic fungi that can be dangerous to consume. The US Department of Agriculture's Food Safety and Inspection Service (USDA) advises against consuming mouldy onions, as they can cause allergic reactions or respiratory problems.
Moulds are microscopic fungi that live on plant or animal matter, and they can produce spores that can travel through air, water, or insects. These spores can give mould its visible colour, which may appear as the black coating on an onion. The mould can penetrate food even when it is only visible on the surface, making it difficult to detect with the naked eye.
Inhaling mould spores can cause respiratory problems, and it's essential to handle mouldy onions with care. The USDA cautions that if mould growth is extensive and widespread, it's best to discard the onion instead of trying to scrub it clean and consume it.
Mould grows in warm and humid conditions, making it essential to store onions in a cool and dry place. If you notice black spots on an onion, it's best to err on the side of caution and discard it to avoid any potential health risks.
## Why it matters The presence of mould on onions can have significant implications for food safety. Consuming mouldy onions can lead to allergic reactions or respiratory problems, which can be severe in some cases. By understanding what causes black spots on onions and taking the necessary precautions, consumers can reduce the risk of foodborne illnesses and ensure a safe and healthy diet.



