Carbohydrate
* provide an efficient source of energy - it requires less oxygen to burn than protein or fat- this makes it the body's most efficient source of energy. Carbs are vital during intense exercise when the oxygen availability is less than that needed.
* fuels the brain and nervous system - when you are low on carbs you can be less able to concentrate, lethargic, irritable, confused and find simple tasks difficult.
* carbs aid the metabolism of fats - they help your body to burn fat effectively, your body must have some carbs to allow fat to be used as energy. As you store much more fat in your body than carbs your diet needs to contain enough carbohydrates to allow fat burning.
* carbs preserve proteins - if you eat enough carbohydrates this spares your body from using protein (from your muscles) as a source of energy. Is is not advisable to use protein as a source of energy as it is needed for more important tasks like, to grow, maintain and repair body tissue as well as synthesising enzymes and hormones.
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