Why does prepared food contain more energy and higher amounts of nutrients than raw food?
Prepared chicken contains more proteins and energy (kJ/kcal) than raw chicken. Why?
When preparing food, the loss of water results in an increased concentration of other nutrients.
The amount of energy-yielding nutrients, such as protein, fat, carbohydrate and dietary fibre will increase per 100 g of food, and contribute with more energy.
Some food items are gaining more water during the preparation, for instance rice and pasta. The water content will increase, and the energy content decrease.
Read more about weight change in prepared food in the booklet "Weight, measures and portion sizes of foods".