Junk food is ubiquitous in modern society, with fast food restaurants and processed snacks available on every street corner. Many of these foods are high in sugar, high fructose corn syrup, hydrogenated oils, and fructose. While these ingredients may make food taste delicious, they can also have a powerful effect on the brain, leading to addiction-like behavior and withdrawal symptoms that mimic those of opioid withdrawal.
Sugar and fructose’s effect on the brain
Sugar and fructose are two ingredients that are commonly found in junk food, and they have been shown to have a powerful effect on the brain. When we eat sugar or fructose, our brain releases a neurotransmitter called dopamine, which is responsible for feelings of pleasure and reward. This is why many people find sugary foods to be so appealing – they activate the brain’s reward system and make us feel good.
However, over time, the brain can become desensitized to dopamine, and we need more and more sugar or fructose to achieve the same level of pleasure and reward. This is similar to how drug addiction works, with the brain becoming accustomed to a certain level of stimulation and requiring more and more to achieve the same effect.
Hydrogenated oils and high fructose corn syrup
Hydrogenated oils and high fructose corn syrup are two other common ingredients in junk food that have been shown to be addictive. Hydrogenated oils are created when liquid vegetable oils are processed to make them more solid, and they are commonly used in processed foods to give them a longer shelf life and a more desirable texture.
High fructose corn syrup is a sweetener that is commonly used in soft drinks, baked goods, and other processed foods. It is made by processing corn syrup to create a sweetener that is cheaper and easier to use than sugar.
Studies have shown that both hydrogenated oils and high fructose corn syrup can have a negative impact on the brain. Hydrogenated oils have been shown to reduce the brain’s ability to communicate with itself, leading to impaired cognitive function and an increased risk of depression and anxiety.
High fructose corn syrup has been shown to be particularly addictive, with studies showing that it can create changes in the brain that mimic those seen in drug addiction. One study found that rats that were given high fructose corn syrup exhibited behavior that was similar to that seen in drug addicts, including increased cravings, tolerance, and withdrawal symptoms.
Withdrawal symptoms
Withdrawal symptoms are another hallmark of addiction, and many people who try to cut back on junk food experience symptoms that are similar to those seen in opioid withdrawal. These symptoms can include headaches, fatigue, irritability, and even depression.
One study found that rats that were given a diet high in sugar and fat exhibited withdrawal symptoms when the diet was removed, including anxiety, depression, and a decrease in cognitive function. This suggests that junk food can create addiction at a biochemical and neurological level and that cutting back on these foods can be difficult for many people.
A review of major studies regarding junk food
Avena, N. M., Rada, P., & Hoebel, B. G. (2008). Evidence for sugar
addiction: Behavioral and neurochemical effects of intermittent, excessive sugar intake. Neuroscience and Biobehavioral Reviews, 32(1), 20-39.
This review article discusses the evidence for sugar addiction, including the behavioral and neurochemical effects of excessive sugar intake. The authors argue that sugar addiction is a real phenomenon and that it can lead to changes in the brain that mimic those seen in drug addiction.
Bocarsly, M. E., Powell, E. S., Avena, N. M., & Hoebel, B. G. (2010). High-fructose corn syrup causes characteristics of obesity in rats: Increased body weight, body fat and triglyceride levels. Pharmacology Biochemistry and Behavior, 97(1), 101-106.
This study found that rats that were given high-fructose corn syrup exhibited characteristics of obesity, including increased body weight, body fat, and triglyceride levels. The authors suggest that high-fructose corn syrup may be particularly addictive, and that it can lead to changes in the brain that promote overeating and weight gain.
Ferguson, S. G., & Shiffman, S. (2009). The relevance and treatment of cue-induced cravings in tobacco dependence. Journal of Substance Abuse Treatment, 36(3), 235-243.
This review article discusses the relevance and treatment of cue-induced cravings in tobacco dependence. While the article does not focus specifically on junk food addiction, it provides valuable insights into the role of cravings in addiction and how they can be managed through behavioral and pharmacological interventions.
Gearhardt, A. N., Davis, C., Kuschner, R., & Brownell, K. D. (2011). The addiction potential of hyperpalatable foods. Current Drug Abuse Reviews, 4(3), 140-145.
This review article discusses the addiction potential of hyperpalatable foods, which are foods that are high in sugar, fat, and/or salt. The authors argue that these foods can create addiction at a biochemical and neurological level, leading to increased cravings, tolerance, and withdrawal symptoms.
Johnson, R. K., Appel, L. J., Brands, M., Howard, B. V., Lefevre, M., Lustig, R. H., … & Wylie-Rosett, J. (2009). Dietary sugars intake and cardiovascular health: a scientific statement from the American Heart Association. Circulation, 120(11), 1011-1020.
Lustig, R. H., Schmidt, L. A., & Brindis, C. D. (2012). Public health: The toxic truth about sugar. Nature, 482(7383), 27-29.
This article discusses the negative impact of sugar on public health, including its addictive potential and the role it plays in the obesity epidemic. The authors argue that sugar should be regulated like alcohol and tobacco, and that public health campaigns should be developed to educate the public about the dangers of excessive sugar consumption.
Moss, M. (2013). The extraordinary science of addictive junk food. The New York Times Magazine, 20.
This article provides an in-depth look at the science behind the addictive potential of junk food. The author explores how food companies have used science to create products that are highly palatable and addictive, and how this has contributed to the obesity epidemic.
Schulte, E. M., Avena, N. M., & Gearhardt, A. N. (2015). Which foods may be addictive? The roles of processing, fat content, and glycemic load. PloS One, 10(2), e0117959.
This study investigated which foods are most likely to be addictive, based on factors such as processing, fat content, and glycemic load. The authors found that highly processed foods, those high in fat, and those with a high glycemic load were more likely to be addictive than unprocessed foods or those with a lower glycemic load.
Wiss, D. A., & Brewerton, T. D. (2010). Incorporating food addiction into disordered eating: The disordered eating and food addiction nutrition guide (DEFANG). Eating and Weight Disorders-Studies on Anorexia, Bulimia and Obesity, 15(1-2), e45-e50.
This article discusses the concept of food addiction and how it can be incorporated into the treatment of disordered eating. The authors argue that food addiction is a real phenomenon and that it should be addressed as part of the overall treatment plan for individuals with disordered eating.
Final thoughts
Overall, the research suggests that junk food containing fructose, hydrogenated oils, high fructose corn syrup, and sugar can have an addictive potential, leading to changes in the brain that mimic those seen in drug addiction. These changes can lead to increased cravings, tolerance, and withdrawal symptoms that can make it difficult for individuals to cut back on junk food. It is important for individuals to be mindful of the ingredients in the foods they consume and to choose healthier alternatives to break free from the cycle of junk food addiction.