Here’s something you may not have thought about: For some foods (in this case we’re talking about bananas), the nutritional effects on your health can vary depending on the ripeness level when you eat it.
As a banana ripens, its nutritional content — the amount of sugar, starch and vitamins — changes. Meaning, if you need more sugar before a workout , or less sugar because of diabetes, you may want to eat your banana at a certain ripeness level.
Ahead, registered dieticians share the various ripeness levels, what a banana looks like at each stage, and the health conditions or goals that are best addressed at each level of ripeness.
Underripe
Bananas at this stage look green; they’re firm and difficult to peel.
“This stage has the highest resistant starch and low sugar content,”

HuffPost UK

The Daily Record Health
NBC10 Philadelphia Sports
New York Post
The List
Raw Story
Cache Valley Daily