Banana is one of the favourite fruits to all of us all according to Japanese Scientific Research, full ripe banana with dark patches on yellow skin are better for health because dark patches on yellow skin produces a substance called TNF (Tumor Necrosis Factor). TNF is the substance which has the ability to combat abnormal cells like tumour in the body.
The darker the patches are, the higher will be its capacity to prevent the tumour. Hence, the riper the bananas are, the better the anti-cancer quality. Dark spots on yellow skinned banana are 8 times more potent to prevent tumour.
It is a fact that nutrient content of fruits change slightly as they ripen. As a banana ripens and turns yellow, its levels of antioxidants increase.
These antioxidants in ripe bananas protect your body against cancer and heart diseases. When banana is ripe with dark spots on skin, the starch content changes to simple sugars that are easier to digest and that raise your blood glucose levels. Make sure you are eating them in the final stage of this picture above - sweet, spotty and ripe.