/kloc-It's not normal to lose 40 kg in 0/00 days. Losing weight 1-2 kg per week is considered to be a relatively safe and sustainable weight loss rate. According to this standard, the speed of 100 losing 40 kg a day may be far beyond the normal range. Here are some reasons:

1. health risks: losing weight quickly will bring burdens and risks to the body, including muscle loss, malnutrition, metabolic problems and potential heart and kidney problems.

2. Sustainability: It is difficult to achieve rapid weight loss through extreme dietary restrictions or strenuous exercise for a long time. Once you return to normal diet and activity level, your weight will rebound.

3. Psychological stress: Losing weight too fast has a negative impact on mental health, such as anxiety, nervousness and self-criticism. It is important to pay attention to overall health, including physical and mental health.