As bananas ripen, they get sweeter and more flavorful as their starches turn to sugar, which makes them tastier to eat out of hand and great for sweet recipes like banana bread. They are perfect for baking when speckled with brown all over and have a strong fruity fragrance. Bananas also get softer as they ripen, and their mashability makes them ideal for treats and creamy smoothies.
But just how ripe are we talking about here? Should you be using those completely black bananas on your counter or is it safer to toss them in the compost bin instead? To find out, I checked with the experts at the U.S. Food and Drug Administration (FDA), as well as James E. Rogers, Ph.D., the Director of Food Safety Research and Testing for Consumer Reports.
Good news for Team Ripe Banana: Extremely ripe bananas—even those with a completely black peel—are likely safe to eat. According to a spokesperson for the FDA, "Generally, as long as it is not visibly moldy, it is safe." Rogers concurs, saying he hasn't seen any studies linking foodborne illness to eating extremely ripe bananas.
That said, Rogers states that if your bananas are jet black and mushy, your safest bet is to cook with them rather than eating them out of hand or using them raw in things like smoothies or nice cream.
"The riper the bananas get, the more levels of bacteria could be on them," he says. Those bacteria include spoilage bacteria, which are typically not harmful, but could also be pathogenic bacteria (which can make you sick) picked up during harvesting, processing, or at the grocery store.
Fortunately, heat should kill any pathogenic bacteria that might have been lurking around and multiplying on the bananas as they ripened. "Cooking is a kill step," says Rogers.
Also, note that placing bananas in the fridge or freezer will turn them black. This is natural—bananas don't handle the cold well—and does not mean the bananas are bad. You can still eat them safely as long as they aren't moldy.
3 Signs It’s Time To Throw Away Your Bananas
If you notice any mold on your bananas, it's time to throw them away or toss them in the compost bin. The black skin itself is not mold. Mold on bananas is fuzzy white, gray, or greenish—it looks a lot like mold on bread.
If a banana smells rotten or fermented or is leaking fluid, it's time to say goodbye.
If the fruit inside, not just the peel, is black, that's a sign that your banana is too far gone to safely eat.
The Takeaway
Completely black bananas are likely safe to consume as long as there is no visible mold, a rotten smell, or the fruit inside is black. If none of these are true and your bananas are simply black, your best bet is to cook with them rather than eat them raw.
Mold on bananas is fuzzy white, gray, or greenish—it looks a lot like mold on bread. If a banana smells rotten or fermented or is leaking fluid, it's time to say goodbye. If the fruit inside, not just the peel, is black, that's a sign that your banana is too far gone to safely eat.
If the bananas have any visible signs of mold, throw them out. If they smell off, that's another good indicator that they are no longer okay to use. Rotten bananas will often have a fermented or alcohol-like smell.
When you eat to a plain piece of fruit, a brown banana may not be your first choice. But in most cases, the overripe fruit is still perfectly safe to eat, and there are many other ways to use brown bananas that you may find delicious and enjoyable.
Here's the secret: overripe bananas don't necessarily mean too-ripe bananas for banana bread. It really comes down to personal preference. Those brown-speckled, mostly yellow bananas are still ripe and will bake into a great loaf.
Bananas with black spots are safe for consumption and do not pose any health risks. However, exercise caution if a banana with dark spots emits a bad odour. In such cases, it is advisable to steer clear and opt for a fresher alternative. Trust your senses when it comes to ensuring the quality of this nutritious fruit.
That's not a problem on its own per se, since bananas also have fiber, vitamins, and other nutrients your body needs to thrive. But experts say that noshing on a banana first thing in the a.m., before you eat any other food, can potentially mess with your blood sugar levels—impacting your energy, mood, and more.
Could a late night banana harm your sleep? Bananas are rich in carbohydrates. And researchers have suggested that eating carbohydrate-rich foods in the evening reduces the release of melatonin. Some scientists also think that blood sugar spikes may interfere with sleep.
Mold on bananas is fuzzy white, gray, or greenish—it looks a lot like mold on bread. If a banana smells rotten or fermented or is leaking fluid, it's time to say goodbye. If the fruit inside, not just the peel, is black, that's a sign that your banana is too far gone to safely eat.
Green Bananas Can Offer Health Benefits. Green bananas are less sweet and contain less sugar than riper yellow bananas. They also have more resistant starch, which may benefit blood sugar management and your overall health. Bananas are incredibly tasty and easy to eat.
“Very ripe and overripe bananas are rich in flavor and antioxidants, which can help benefit our immune systems,” says Gabriel. “They also take less time to digest, which can be beneficial, depending on the person.” This phase is also where bananas become just right for adding sweetness and heft to smoothies and shakes.
Yes, dogs can eat bananas. It's tempting to share tasty fruit with your dog, especially when they're staring at you longingly. The good news is dogs can eat bananas in reasonable quantities as an occasional treat.
The reaction does change the color as well as make the tissue feel softer or even mushy but it is not an indication that the fruit should no longer be eaten. The bruise is simply displeasing aesthetically but not a health hazard.
Therefore, eating a banana every day is certainly a good idea. However, if a person has any health concerns, including uncontrolled diabetes, late-stage kidney failure, or is taking medication for high blood pressure, they should check with a health professional to see if bananas are safe for them to eat.
Answer: It is true that the sunken black/brown spots on the banana fruit are due to a mould. The condition is referred to as anthracnose. The mould that causes the spots is called Colletotrichum musae. It is a post-harvest problem of banana fruits all over the world.
A person with diabetes should include a variety of fresh, whole foods in their diet, such as nutrient-dense fruits and vegetables. Bananas are a safe and nutritious fruit for people with diabetes to eat in moderation as part of a balanced, individualized eating plan.
If the banana is totally brown with no yellow showing, is soft or squishy, is showing signs of mold, is leaking fluid or smells rotten, it is beyond saving. A banana that is ripe will have a yellow skin covered in brown spots, will smell sweetly of banana and will be the texture of a ripe avocado.
According to experts at SleepJunkie.com, "Bananas are a superfood that can be enjoyed pretty much any time of the day. However, eating them too close to bedtime can contribute to a restless night's sleep and stimulate vivid dreams or nightmares."
When high-protein foods like meat or eggs are combined with bananas, they slow down the body's digestive process. Combining bananas with slow-digesting proteins also causes gas and fermentation in the digestive tract.
Surprisingly, underripe bananas foster (*wink*) a host of positive effects in the body. These banana babies happen to be extremely high in fiber — even higher than ripe bananas. This is because they contain an abundance of a substance called resistant starch.
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