## What the Study Showed Scientists from the University of Copenhagen conducted an analysis using Mendelian randomization methods, as well as data from large genetic studies. The sample included over one million people who started smoking, about 450,000 regular smokers, and more than 600,000 participants whose body fat distribution was assessed. ## Connection to Abdominal Fat The results showed that both the initiation of smoking and long-term tobacco use are associated with an increase in fat in the abdominal area. This was confirmed by changes in the waist-to-hip ratio — one of the key indicators of fat tissue accumulation. ## Why This Matters Further analysis suggested that this primarily concerns visceral fat — a type of fat tissue that accumulates around internal organs. This type is considered the most dangerous, as it is linked to an increased risk of cardiovascular and other chronic diseases. ## Conclusions of the Specialists Researchers emphasize that the findings are significant for public health. Quitting smoking may be important not only for protecting the lungs and heart but also for controlling fat distribution in the body. Thus, cigarettes are not an effective way to manage weight, and their impact on the body may be more complex and adverse than previously thought.