The cool thing about them is that their nutritional value changes at every step during the ripening process.
When a banana is unripe, it is full of fiber, starches and complex carbohydrates which slowly break down into sugars as the banana ripens. As the banana ripens, the water soluble vitamins tend to break down and reduce while the antioxidants increase. Even when complex chemical restructuring of the banana happens, the total calories will remain the same: Between 100-140 cal per banana. This is because whether it is a starch or gets broken down into a sugar, it's still a carbohydrate which means that it will give you 4 calories per gram.
Both unripe and ripe bananas are:
Rich in Potassium - helping to keep blood pressure in check
Rich in Vitamin C, B6 and B12
Rich in Resistant Starches - these starches don't get absorbed by your digestive system, and make it to your intestines intact. Here, they act as a pre-biotic, feeding your gut bacteria and making them stronger, happier and healthier.
Contain Zero Fat: all the goodness, none of the fat. Helps to make a more balanced diet!
Full of Fibre - fiber plays a big role in digestive health and can help with bowel regularity. They help in maintaining blood sugar levels and also help lower cholesterol.
Can help in Weight loss - the fiber will take a long time to digest, meaning you’ll feel full for longer.
Raw or Green bananas are really useful to treat gastritis and IBS but avoid them if you are suffering from constipation.
Best way to eat green bananas: steamed or boiled with some spices and salt.
They are best for times when:
1. You need a quick boost of energy
2. When you are feeling constipated
3. The riper the banana - the more antioxidants it will have!
Nutrition Label - Banana
You can get the full nutritional information on the banana from the USDA: https://fdc.nal.usda.gov/fdc-app.html#/food-details/790991/nutrients