According to nutritionist Monica Auslander Moreno, founder of Essence Nutrition in Miami, bananas don't lose their fiber, but the fiber changes as they ripen. It shifts from having more resistant starch to having less resistant starch as it ripens.
Resistant starch is a type of prebiotic fiber found primarily in foods such as grains, potatoes, bananas, and beans. These starches resist breakdown in the digestive tract, allowing them to remain intact until they reach the large intestine, where they can be used as fuel for beneficial gut bacteria.
A green banana contains over 3 grams of fiber, while a ripe banana contains less than 2 grams. This difference in fiber content may be due to the changes in the banana's carbohydrate content as it ripens.
Another thing that changes as bananas ripen: their satiety factor. This means that eating green or unripe bananas can keep you feeling full longer than eating ripe bananas. However, green bananas may not taste as good as ripe ones, so choose bananas that are medium-ripe.
Source: https://laodong.vn/suc-khoe/chuoi-co-mat-chat-xo-khi-chin-1392987.ldo
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