Bananas are a source of vitamin B6, manganese, vitamin C, potassium, dietary fiber, biotin and copper. They have about 105 calories and contain carbohydrates, sugar, sodium and amino acids. There is a difference in nutritional content between ripe and unripe bananas due to changes in the fruit.
As a banana ripens, starch is converted to sugar and antioxidant levels increase. This causes some micro nutrient loss. This is the reason bananas have a high glycemic index that makes them easy to digest. Despite that, both ripe and unripe bananas contain a rich array of nutrients that cushion the human body from various maladies.
Banana peels also possess high amounts of vitamin B6 and B12, magnesium, potassium, fiber, protein and bioactive compounds such as polyphenols, carotenoids and others.