When lower needs are met people do not necessarily go on to meet higher needs. Higher needs may overcome lower needs We each develop our own hierarchy. Hunger Changes in body chemistry affect hunger. Increases in the hormone insulin diminish blood glucose, partly by converting it to stored fat, causing hunger. Body chemistry also influences taste preferences.
Carbohydrates help boost levels of the neurotransmitter seortine, which has calming effects.
The brain automatically, via the hypothalamus, monitors information on your body's internal state. These hypothalamic centers influence how much glucose is converted to fat and how much is left available to fuel immediate activity. Set point suggests that the body maintain a desired weight level by adjusting the individual's metabolic rate. The Psychology of Hunger Culture and Hunger Preferences for sweet and salty tastes are genetic and universal. For externals food consumption is triggered by the presence of food than by internal factors.