Our body craves fatty, sugary, and salty foods because they're calorie-dense and were scarce in the past.
Processed foods are designed to be addictive.
The brain releases dopamine when we eat these foods.
Food engineers utilize this and use bliss point in processed food to make them more addictive. The book calls these foods blissy foods.
All processed foods contain some level of sugar, salt, and fat.
Baked foods like supermarket bread are also processed foods and contain high levels of sugar and salt.
The brain relies on leptin to regulate hunger.
The dopamine released by blissy foods can interfere with leptin and make the brain less sensitive to it, causing leptin resistance and making us eat more.
Sugary food can cause a spike in blood sugar levels, which can lead to a crash later, resulting in a loop of craving more sugary food.
Drops in blood sugar levels can also cause irritability, mood swings, and fatigue and make you hungry.
Day to day food is fuel for our body, not a source of pleasure.