The modern sedentary lifestyle and the availability of calorie-dense foods have led to an obesity pandemic, which has become the cause of numerous dangerous comorbidities [1]. Amidst the search for effective and accessible methods of weight control, intermittent fasting has gained immense popularity on the internet [1]. This approach is based on alternating periods of eating and strict time restrictions [1].
How intermittent fasting helps with weight loss
Time-restricted feeding is a type of calorie control method [1]. The main idea is to fit all daily meals into a short time window, leaving a longer period for complete fasting [1].
- The breakdown of fat deposits and glycogen stores is accelerated [1].
- Total caloric intake is reduced by limiting the time available for eating.
- Cellular repair processes and autophagy are stimulated [5].
Potential benefits for metabolism and immunity
In addition to fighting excess weight, scientists are studying the impact of periodic abstinence from food on chronic pathologies. Research shows that intermittent fasting may have beneficial effects on autoimmune diseases such as rheumatoid arthritis, systemic lupus erythematosus, and type 1 diabetes [5]. This is achieved by modulating the immune system, improving the composition of the gut microbiota, and reducing systemic inflammation [5]. Furthermore, a cardioprotective effect of such dietary habits has been noted [1].
The other side of the coin: risks and food insecurity
Despite its apparent simplicity, drastic dietary restrictions are not suitable for everyone. The problem of lacking stable and adequate access to quality food (food insecurity) is directly linked to an increase in adverse health outcomes [2]. According to large-scale reviews, irregular or deficient nutrition correlates with an increased risk of obesity (odds ratio 1.42), overweight, as well as the development of binge eating disorder (odds ratio 1.99), stress, anemia, and even suicidal ideation [2]. Thus, spontaneous or rigid fasting without medical supervision can trigger a breakdown in mental stability and eating disorders.
Who should exercise caution
Before changing dietary habits and starting intermittent fasting, it is important to assess individual risks. Uncontrolled fasting is dangerous for people with chronic gastrointestinal diseases, pregnant women, adolescents, and individuals with a predisposition to eating disorders. In some cases, modern medical approaches become an alternative or supplement to diets, for example, therapy with GLP-1 receptor agonists, which also help control binge eating episodes [4, 6], although any method requires competent medical supervision.
Sources
- 1. A Narrative Review on Intermittent Fasting as an Approachable Measure for Weight Reduction and Obesity Management (Cureus, 2022)
- 2. The Association Between Food Insecurity and Adverse Health Outcomes in Adults: An Umbrella Review of Systematic Reviews and Meta-Analyses (Nutrition Reviews, 2026)
- 4. GLP-1 Receptor Agonist Medications for Obesity and Type 2 Diabetes Treatment: A Rapid Review of Changes in Eating Behaviors and Eating Disorder Risk (Obesity Reviews, 2026)
- 5. Intermittent fasting: A promising dietary intervention for autoimmune diseases (Autoimmunity Reviews, 2023)
- 6. The effectiveness of glucagon-like peptide-1 receptor agonists (GLP-1RAs) on binge eating in patients with obesity: a systematic review and meta-analysis (EClinicalMedicine, 2026)
Disclaimer: The information is provided for reference purposes only. It does not replace an in-person consultation with a nutritionist or a specialized physician.