For 
                      as long as humans have lived on Earth, they have been eating 
                      foods that taste sweet, such as sugar cane and honey.
                    So, 
                      the brain has a conditioned response in reaction to eating 
                      something sweet.
                    It 
                      is called the Cephalic Phase Insulin Response 
                      (CPIR), and it’s responsible for the 
                      fat-storing effects of diet beverages, including diet sodas, 
                      diet tea, coffee, energy drinks, sports drinks, and flavored 
                      waters.
                    This 
                      adaptation in humans is a reaction to the ingestion of sweet-tasting 
                      foods. The body learned to associate sweet-taste on the 
                      tongue with the resulting sugar-energy-load that landed 
                      in the stomach.
                    The 
                      brain came to perceive sweet-taste with the need to program 
                      the liver to prepare for the arrival of an outside source 
                      of high energy – sugar.
                    As 
                      the tongue senses something sweet, it programs the brain 
                      to set into motion a series of biochemical events. It doesn’t 
                      matter if the sweet taste comes from natural honey or from 
                      artificial sweeteners.
                    This 
                      biochemical cascade triggers the liver to stop the manufacture 
                      of protein and starch from its body-reserves, and to begin 
                      to store the glucose-energy that circulates in the blood.
                    In 
                      the case of diet beverages, the sweet taste sets these events 
                      into motion. 
                    But 
                      when no calories actually appear in the stomach, this causes 
                      the body to demand real food, with resulting hyper-urges 
                      from the liver to overeat, or to drink more of the sweet-tasting 
                      liquid, and the cascade repeats itself.
                    Almost 
                      instantly, the body starts producing insulin, the “fat” 
                      hormone, which stores sugar in the blood stream, and programs 
                      the adipose tissue fat cells (belly fat) to store, store, 
                      store.
                    This 
                      Cephalic Phase Insulin Response (CPIR) creates reactive 
                      hypoglycemia (low blood sugar), which further triggers strong 
                      cravings for more sweet-tasting items, and high glycemic 
                      foods.
                    After 
                      the taste buds are activated by a sweet-taste, the urge 
                      to ingest food can last from 1 to 2 hours. So, you are hungry 
                      for hours, because no real food or calories has satiated 
                      the body’s need for energy.
                    And 
                      now, the body is producing insulin for no reason, because 
                      the brain has instructed the liver to store instead of burn/release 
                      its storage supplies.
                    The 
                      result is fat, fat, fatter - the Cephalic Fat Spiral