Are Black Spots on Bananas Safe to Eat? Nutritionist's Advice - Nutrition

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Hello, I have recently noticed that when eating bananas, there are often some black spots on the flesh, regardless of whether they are unripe or overripe.
I initially thought it was bruising and continued to eat them, but I saw a video stating that the black parts are spoiled and should not be eaten.
Which one is correct, nutritionist? Should I continue to eat them? Thank you.

Nick, 20~29 year old female. Ask Date: 2022/01/24

Dr. Cai Xiuwen reply Nutrition


Hello, typically, bananas ripen with black spots on the peel rather than on the flesh.
If there are black spots on the flesh, it is advisable to avoid consumption.
This message is brought to you by the Nantou Hospital of the Ministry of Health and Welfare.
Wishing you safety and good health.

Reply Date: 2022/01/24

More Info


When it comes to bananas, the appearance of black spots can be a source of confusion for many consumers. The question of whether these black spots indicate spoilage or bruising is important for both food safety and nutritional value. Based on the information provided by nutritionists and health experts, here’s a comprehensive answer to your question.

Firstly, it’s essential to differentiate between the types of black spots you might encounter on bananas. Bananas can develop black spots on their skin as they ripen, which is a normal part of the ripening process. These spots are typically harmless and indicate that the banana is sweet and ready to eat. However, if you notice black spots on the flesh of the banana, this could be a different matter.

Black spots on the flesh of a banana can occur due to bruising, which happens when the fruit is handled roughly or dropped. Bruising can cause the cells in the banana to break down, leading to darkened areas. While bruised bananas are not harmful to eat, they may have a different texture and taste compared to unbruised fruit. If the bruised areas are small, you can simply cut them out and consume the rest of the banana.

On the other hand, if the black spots on the flesh are extensive or accompanied by an off smell, this could indicate that the banana is starting to spoil. Spoilage can lead to the growth of mold or bacteria, which can pose health risks if consumed. In such cases, it is advisable to avoid eating the affected parts or the entire banana if the spoilage is significant.

In summary, if you encounter black spots on the flesh of a banana, assess the extent of the discoloration. If it is minor and the banana still smells fresh, it is generally safe to cut away the affected areas and eat the rest. However, if the banana has a foul odor or the black spots are widespread, it is best to discard it to avoid any potential health risks.

From a nutritional standpoint, bananas are a great source of essential nutrients, including potassium, vitamin C, and dietary fiber. Eating ripe bananas, even those with minor bruising, can still provide these health benefits. However, if the fruit is spoiled, it may not only lose its nutritional value but could also lead to digestive issues if consumed.

In conclusion, while black spots on bananas can be concerning, they are not always a sign of spoilage. Understanding the difference between bruising and spoilage can help you make informed decisions about what to eat. Always trust your senses—if the banana looks and smells good, it’s likely safe to eat, even if it has a few black spots. If in doubt, it’s always better to err on the side of caution and choose a fresher piece of fruit.

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