Jason Robertson

“In 2003, scientists at Kyushu University in Japan fed one group of rats hard food pellets and another group softer pellets. In every other respect the pellets were identical: same nutrients, same calories. After twenty-two weeks, the rats on the soft-food diet had become obese, showing that texture is an important factor in weight gain. Further studies involving pythons (eating ground cooked steak, versus intact raw steak) confirmed these findings. When we eat chewier, less processed foods, it takes us more energy to digest them, so the number of calories our body receives is less. You will get more energy from a slow-cooked apple puree than a crunchy raw apple, even if the calories on paper are identical.”
― Bee Wilson, Consider the Fork: A History of How We Cook and Eat