What are dangerous dietary trends?

In the modern world, where access to information is instant and social media plays a big role, new dietary trends or so-called “fad diets” are constantly emerging.

While some of them may contain some positive recommendations, most are dangerous and can seriously endanger your health.

What are dangerous dietary trends?

Dangerous dietary trends are usually diet plans that promise quick and easy results (e.g., extremely fast weight loss) with minimal effort.

Key characteristics that indicate danger include:

• Extreme restriction: Eliminating entire food groups (e.g., all carbohydrates, all fats, all dairy products).

• Monotonous dieting: Consuming a very limited number of foods.

• Unrealistic promises: Promising extremely fast weight loss or a “detox” without scientific basis.

• Lack of scientific evidence: They are not based on robust scientific research, but rather on anecdotes and personal testimonies.

• Require expensive products/supplements: They often promote expensive powders, pills, or special foods that are said to be key to the diet’s success.

• One-size-fits-all approach: They do not take into account an individual’s individual needs, health status, or lifestyle.

The most common types of dangerous diets and their dangers

Extremely low-calorie diets (e.g., “crash diets,” cabbage soup diets):

o What they are: A drastic reduction in daily calorie intake (e.g., below 1000-1200 kcal/day).

o Dangers: Rapid weight loss is primarily due to loss of water and muscle mass, not fat. They can cause nutrient deficiencies, fatigue, anemia, heart rhythm disorders, gallstones, a weakened immune system, hair loss, and dehydration. They most often lead to a yo-yo effect, where the weight quickly returns after stopping the diet, often even higher than before, as the body slows down its metabolism.

Diets that exclude entire food groups (e.g., strict keto diet without vegetables, carbohydrate-free diets):

o What they are: Complete elimination of one or more important food groups (e.g., all carbohydrates, all fruits, all dairy products).

o Dangers: Lack of key nutrients present in the excluded foods (e.g., fiber from grains, vitamins from fruits, calcium from dairy products). This can lead to digestive problems (constipation), vitamin and mineral deficiencies, weakened bones, and even heart problems (especially when excessive intake of unhealthy fats instead of carbohydrates).

Diets that focus on one food or food group (e.g. “soup diet”, “grapefruit diet”, lemon water diet):

o What they are: Eating a single food or a very limited range of foods in large quantities.

o Dangers: Extreme lack of variety in nutrients, which can lead to serious malnutrition, fatigue, weakness and later the yo-yo effect. They are very difficult to maintain and do not teach healthy eating habits.

“Detox” diets and cleanses:

o What they are: Drinking only juices, liquids or eating a very limited number of foods with the promise of “cleansing” the body of toxins.

o Dangers: The human body has its own effective mechanisms for detoxification (liver, kidneys). These diets are often low in calories and can cause dehydration, electrolyte imbalances, muscle loss and deficiencies in key nutrients. There is no scientific evidence that they are effective.

Diets that promote extremely high intakes of certain nutrients (e.g., extreme high-protein diets):

o What they are: Strong emphasis on one macronutrient at the expense of others.

o Dangers: Excessive protein intake can strain the kidneys and liver. Lack of carbohydrates can cause fatigue, headaches, low mood, and lack of fiber. In the long run, it can affect cardiovascular health.

General consequences of dangerous dietary trends

• Yo-yo effect: The most common consequence, as the body tends to return to its previous weight after a strict diet, often with additional kilograms. This weight fluctuation is more dangerous to health than a stable, albeit slightly increased weight.

• Nutrient deficiency: Restricting entire food groups leads to a deficiency of vitamins, minerals, and essential fatty acids.

• Eating disorders: Extreme diets can trigger an unhealthy attitude towards food and lead to eating disorders such as anorexia or bulimia.

• Organ damage: In the long term, it can overload the kidneys, liver, or heart.

• Psychological problems: Frustration from failure, poor body image, irritability, depression.

• Slowed metabolism: The body responds to prolonged calorie restriction by reducing its basal metabolic rate, making it more difficult to lose weight later.

How to recognize and avoid dangerous trends?

• Be skeptical of quick promises: Healthy weight loss is a slow process (0.5-1 kg per week).

• Find scientifically supported information: Reliable sources are recognized health organizations and qualified experts (dietitians, doctors).

• Avoid diets that exclude entire food groups without a good reason.

• Do not believe in “miracle” products or pills.

• Consult an expert: Before making any drastic changes to your diet, talk to your doctor or clinical dietitian.

A healthy and sustainable path to well-being is a balanced diet, regular physical activity and a holistic approach to health, not quick and extreme diets. Focus on building healthy habits that you can maintain for a lifetime.