Chocolate

Chocolate may be delicious and decadent, but is it addictive? Can something so good be so bad for us? There has been an exponential increase in scientific publications on food addiction in recent years, spurred by a study in which nine out of ten rats allowed to choose between sugar-sweetened water or intravenous cocaine chose the sweet taste over one of our most addictive drugs.

People have been chewing coca leaves for at least eight thousand years as a mild stimulant without any evidence of addiction, but when it is processed into a concentrated form for rapid delivery, such as cocaine and crack, it becomes highly addictive. Similarly, the sugarcane stem has been chewed for its pleasant taste for ages, but it only presents a disproportionate reward signal once highly refined into added sugars with the potential to override our self-control mechanisms, thereby leading to analogous addictive-type behaviors.

As with many drugs of abuse, salt, sugar, and fat are substances found in nature, but they exist naturally in much smaller concentrations and may only become problematic when extracted and concentrated by modern industrial processes.

Why don’t we crave trail mix as much as chocolate? That’s about as sugary and fatty as natural foods get. The key appears to lie in the processing, which simultaneously increases the dose and speed of absorption of the sugar and fat, while concurrently stripping away fiber, protein, and water.

In the landmark “Which Foods May Be Addictive?” study, dozens of foods were ranked based on reports of problematic, addictive-type behaviors. The two most troublesome were high-fat, high-sugar combos: chocolate and ice cream. The bottom ten least-addictive foods were strawberries, apples, corn, salmon, bananas, carrots, brown rice, cucumbers, broccoli, and beans.

The information on this page has been compiled from Dr. Greger’s research. Sources for each video listed can be found by going to the video’s page and clicking on the Sources Cited tab. References may also be found at the back of his books.

Image Credit: Pixabay. This image has been modified.