| The most important energy sources, by quantity, are carbohydrates. These are divided into two groups: starches and sugars. Starches are mainly found in the following foods: | |
| Cereals (bread, rolls, rice, pastry, oats) | |
| Potatoes | |
| Vegetable or pulses | |
| The most important sources of sugar are: | |
| Fruit | |
| Milk (via the lactose) | |
| Honey | |
| 1g carbohydrate provides approx. 4 kcal The body relies on a constant supply of carbohydrates, because it cannot store them in any large quantities. Of the roughly 2000 calories (kilocalories, kcal) that an adult requires every day, over half – more than 1000 kcal – should come from carbohydrates. One gram of carbohydrate provides around 4 calories (kcal) of energy. This means that to obtain 1000 kcal the body needs around 250 g of carbohydrates. This quantity is found, for example, in one pound of bread – or in approx. 250 g of pure dextrose. |
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