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1) Fat/lipids are needed to absorb and utalise fat souluble vitamins, specifically vitamins A, S, E, K.

2) Fat/lipids provides a protective cushoning layer around important internal organs. Obviously too much is not a good thing but without the cushioning affect that fat provides your internal organs are very suseptible to impact damage

3) Fat/lipids are used as the body's back up energy store. When carbohydrates (in all forms) are exhausted your body will use the energy it has previously stored as fat. Without this back up energy store, if carbohydrate energy sources were depleted, you would immediately start to burn stored protein e.g muscle

4) Fat/lipids are needed for normal hormonal functions throughout the body

There you go, choose the two you like :)

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