Gastroenterologist Sergey Vyalov has warned that popular monodiets can weaken the immune system and cause serious digestive problems for followers.
Writing on his Telegram channel, Vyalov urged Russians to give up single-food dietary regimes, stating that medical research does not support claims that they assist with weight loss or reset the gastrointestinal tract.
Monodiets are restrictive eating plans in which a person consumes only one specific food product for several days or weeks. While single-food diets have recently become a popular trend, medical specialists emphasize that human digestion relies on a wide variety of dietary inputs.
Gastroenterology is the branch of medicine focused on the health of the digestive system, which includes the stomach, small intestine, colon, liver, and pancreas.
Health risks of single food diets
Vyalov explained that eating a single food item over an extended period reduces the diversity of microorganisms residing in the gut. This reduction in gut microbial diversity leads directly to lower immunity and impaired digestive function.
The human gastrointestinal tract hosts trillions of micro-organisms that form the gut microbiome. A diverse microbiome is widely recognized in medical literature as essential for breaking down nutrients, protecting against harmful bacteria, and maintaining a robust immune response.
In addition to digestive issues and weakened immunity, Vyalov warned of nutrient deficiency as another primary danger of monodiets. He noted that no single food product contains all essential micronutrients required to sustain human health.
Micronutrients include vital vitamins and minerals that the human body cannot produce by itself. Depriving the body of balanced nutrition over days or weeks can interfere with cellular repair, energy production, and immune defense.
Balanced breakfast for weight loss
Vyalov's warning follows guidance previously offered by nutritionist Ali McGowan, who identified the ideal breakfast formula for people who want to lose weight.
McGowan stated that the first meal of the day should include a combination of protein, healthy fats, and complex carbohydrates, rather than relying on extreme dietary restrictions.
Dietary experts note that balanced meals containing complex carbohydrates, protein, and beneficial fats digest gradually, helping regulate appetite and maintaining steady energy levels throughout the day.
