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Health Tips: Such onions are cheap to buy, but will be expensive for health.
Samira Vishwas | October 31, 2025 3:24 AM CST

It is often seen that we take food and drinks without even looking at them. Whereas the way of keeping and using some things can be harmful for our health. Onion is available in stock in everyone’s house. People buy 5-10 kg of onions at one go and store them. Onion is used in making vegetables, salads and many other dishes. Onion is also considered good for health. Eating onion improves digestion.

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But if you eat bad onion then it can cause harm instead of benefit. Yes, if black spots are visible on the onion then you should not eat such onion. If there are black marks on the top layer of the onion only, then remove the peel completely, but if there are black marks on the outer layer of the onion and there are such marks in the inner layer as well, then this onion should not be eaten even by mistake.

Onion fungus can be dangerous

Let us tell you that the black spots and marks visible on onion are fungus. The black fungus seen in onion is actually Aspergillus Niger. Since onion is found in soil and Aspergillus Niger is also found in soil. It reaches inside the onion from the soil. Although it is not as dangerous as black fungus, but after reaching inside the body, it can increase the problem of allergy.

These people should not eat such onions even by mistake

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People who have weak immunity and those who are suffering from asthma should stay away from it. TB or HIV patients should also avoid consuming this type of onion. Eating such onion is also very harmful for a diabetic patient. This fungus has pores which reach the lungs through the nose and cause infection. This fungus can cause asthmatic attack in an asthma patient.


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