Does sugar-free cola not cause weight gain?

　　Sugar-free cola generally refers to beverages that contain no sugar or low levels of sugar. Under normal circumstances, if one's daily diet and lifestyle habits are relatively healthy, moderate consumption will not lead to weight gain. However, excessive consumption combined with insufficient physical activity may result in weight gain. A detailed analysis is as follows:

　　Sugar-free cola uses sugar substitutes or other sweeteners to replace traditional sugars. Sugar-free cola contains fewer calories and less sugar compared to regular cola. If one maintains a healthy diet and lifestyle, moderate consumption of sugar-free cola combined with sufficient physical activity to burn off the consumed calories typically will not lead to weight gain.

　　Artificial sweeteners may interfere with the body's metabolic mechanisms, affecting insulin sensitivity and appetite regulation, thereby indirectly promoting weight gain. Therefore, long-term excessive consumption may still lead to excessive calorie intake and subsequently cause obesity. Additionally, if regular physical activity is lacking, the calories from sugar-free cola may also be converted into fat and accumulate in the body, leading to weight gain.

　　Therefore, it is recommended to consume sugar-free cola in moderation and combine it with healthy dietary and lifestyle habits to maintain a healthy weight and overall health.