Live longer - with added fibre?

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Fad diets and new “superfoods” come and go, but scientists say eating 30g of fibre a day could have health benefits beyond keeping you regular.
We've lined up some foods to help to reach that magic number:

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One apple - 4g of fibre
It's not the weight of the apple that counts, it's what's left after you strip out everything else - including natural sugars and water

A thick slice of brown bread - 2g of fibre
(plus the apple = 6g)

One potato, with skin on - 2g of fibre
(plus the apple and bread = 8g)

A cup of cooked lentils - 4g of fibre
(plus the apple, bread and potato = 12g)

Two carrots - 6g of fibre
(plus the apple, bread, potato and lentils = 18g)

Half a cup of rolled oats - 9g of fibre
(plus the apple, bread, potato, lentils and carrots = 27g)

Two Weetabix - 3g of fibre
(plus the apple, bread, potato, lentils, carrots and oats = 30g)