Taubes‘ books also explained why, although I had 3 children who were offered the same food, only one of them was overweight.  They explained why a child could be overweight even while eating the recommended 5 to 9 servings of vegetables and fruit a day.  While not drinking soda, juice, or even milk–just water.  While not eating fast food.  While virtually never eating out at all.  While rarely eating dessert. While being physically active.