As the banana grows the nutritional properties are changing. The banana becomes sweeter as they ripen, due to the enzymes which begin to break down starches which are not sweet in general) into sugar. This allows the banana to digest easier in our system.
Recent research made from Japanese researchers discovered interesting fact about bananas. – ripen banana produce more antioxidant than fresh one.
The dark spots on the banana peels means that the banana produces TNF, or Tumor Necrosis Factor, a substance that combats cancer and abnormal cells. The darker the spots, the more powerful the banana is at killing cancer cells.
Ripe banana can boost the immune system eight times more than fresh banana.
It takes some patience, but is the best to eat bananas when they are ripen.