Why do banana skins get thinner as the fruit ripens? © Getty Images

What’s a banana skin made of, and can you eat it?

Always seen the bright yellow peel as a glorified wrapper for the delicious creamy goodness beneath? Think again, banana skin is tough but edible.

Asked by: Chiara Kemp (aged 11), Belgium

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Banana peel is made of carbohydrates (roughly 60 per cent), fibre (30 per cent), water and small amounts of protein and fat. Banana skin’s thickness and high fibre content make it quite tough and sometimes bitter, but it is edible and contains many minerals including potassium and manganese. Try adding one to a smoothie: take an unpeeled ripe banana, wash it, cut off the ends and slice. Add 200ml milk or yoghurt, a pinch of cinnamon, and blend.

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