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The harms of eating quickly

Dr. Hüseyin Nazlıkul
Dr. Hüseyin Nazlıkul 02.11.2025 5 min read

The habit of eating quickly not only affects the digestive organs, but also has negative effects on the nervous system and the gut-brain axis. From a pathophysiological perspective, consistently eating quickly leads to chronic stress in the digestive system.

Along with today's fast pace, our eating habits are also changing. Unfortunately, we often consume our meals hastily, swallowing our bites without fully chewing them. But eating quickly does not just mean getting up from the table early; it brings with it a range of health risks, from digestive problems to obesity, and even nutrient deficiencies. As Dr. Hüseyin Nazlıkul also emphasizes, the secret to good chewing is not just the mechanical breaking down of food into smaller pieces, but primarily benefiting from the very important enzymes produced as a result of saliva's interaction with food.

BEYOND CHEWING: THE CHEMICAL DANCE OF DIGESTION

Most people think of chewing simply as breaking food into small pieces. Yet chewing is one of the first and most critical steps of digestion. In the mouth, the act of chewing activates the salivary glands, which secrete digestive enzymes such as amylase (ptyalin). These enzymes enable carbohydrates to begin breaking down while still in the mouth. When food is not chewed enough and does not mix well with saliva, this pre-digestion process is disrupted. Large pieces of food reaching the stomach strain the digestive system and cause the stomach to produce more acid and enzymes. Over time, this can lead to problems such as indigestion, bloating, gas, and heartburn.

THE RELATIONSHIP BETWEEN SATIETY AND TIME: WHY WE ARE ALWAYS HUNGRY

From a nutritional physiology perspective, the satiety reflex is related more to time than to the amount we eat. Our brain processes signals coming from the digestive system to create the feeling of fullness. It takes a certain amount of time for these signals to reach and be processed by the brain. When we eat quickly, even if our stomach is full, our brain may not yet have received the satiety signal. This causes us to eat more than necessary and, as a result, increases our caloric intake.

Studies conducted show that people who eat slowly consume fewer calories and stay full longer. For example, a study published in the Journal of the American Dietetic Association in 2014 revealed that people who eat quickly have a higher risk of obesity. This can be explained by the fact that the body does not allow for the release of satiety hormones like leptin, while hunger hormones like ghrelin remain elevated for longer.

PATHOPHYSIOLOGY AND THE NEURAL THERAPY APPROACH: THE HOLISTIC FUNCTIONING OF THE DIGESTIVE SYSTEM

The habit of eating quickly not only affects the digestive organs, but also has negative effects on the nervous system and the gut-brain axis. From a pathophysiological perspective, consistently eating quickly leads to chronic stress in the digestive system. This stress can disrupt the balance of the gut microbiota and pave the way for "leaky gut" syndrome. Leaky gut can cause undigested food particles and toxins to pass into the bloodstream, leading to systemic inflammation.

From a biophysical and regulation medicine perspective, the functioning of the digestive system is regulated by the autonomic nervous system (ANS). While the sympathetic nervous system (associated with stress) is usually active during rapid eating, parasympathetic nervous system activity (rest and digest) is required for digestion. This imbalance can negatively affect the production of digestive enzymes, intestinal motility, and nutrient absorption.

The neural therapy approach emphasizes the importance of the functional integrity of the nervous system. The habit of eating quickly and under stress can disrupt gut-brain communication by lowering the activity of important nerves such as the vagus nerve. This disruption in communication can contribute not only to digestive problems, but also to mood disorders, anxiety, and depression. The intestine produces a large portion of important neurotransmitters such as serotonin, and there is a strong connection between gut health and mental health.

THE PSYCHOLOGY OF NUTRITION AND THE PATH TO OBESITY

The habit of eating quickly is also important from the perspective of nutritional psychology. Behaviors such as emotional eating, eating quickly as a coping mechanism for stress, and mindless eating increase the risk of obesity. Eating under time constraints or in a hurry often prevents us from savoring the taste of food and consciously experiencing the eating experience. This can negatively affect our relationship with food and lead to a feeling of dissatisfaction.

One of the first steps toward obesity is this satiety reflex not functioning correctly. When we continue to consume more than our body needs, the excess calories are stored as fat. This leads to excess weight and obesity over time. Obesity, in turn, is a trigger for many chronic illnesses such as heart disease, diabetes, high blood pressure, and certain types of cancer.

NEW STUDIES AND A LOOK TOWARD THE FUTURE

Recent scientific studies focus on the long-term health effects of the habit of eating quickly. For example, an article published in the journal Nutrients in 2023 showed that eating slowly improves blood sugar control and reduces insulin resistance. These findings support the hypothesis that eating quickly can increase the risk of type 2 diabetes.

In addition, research on the gut microbiota reveals that eating quickly can negatively affect the diversity and balance of the gut flora. A healthy gut microbiota is vital not only for digestion, but also for the immune system and overall health.

MINDFUL EATING AND A HEALTHY FUTURE

Eating quickly is not just a habit; it is a complex issue that deeply affects our health. Affecting many factors ranging from digestive enzymes to gut-brain communication, from the satiety reflex to obesity risk, this condition is a health threat brought on by modern life.

For this reason, it is of great importance to review our eating habits and move toward mindful eating. Chewing our bites slowly and thoroughly, savoring the taste of food, and allowing enough time for our meals will not only relieve our digestive system, but will also help us receive satiety signals correctly, preventing unnecessary calorie intake. These simple changes will help us lead a healthier life in the long term and prevent serious health problems such as obesity.

Do you also give yourself more time while eating, or do you unknowingly eat quickly and finish in a hurry?

You can find more about neural therapy and Hüseyin Nazlıkul's other treatment methods here.

Hüseyin Nazlıkul

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