Losing more than five kilograms (11 pounds) in a week can be unhealthy and potentially dangerous. Rapid weight loss like this is often not sustainable and can lead to the loss of muscle mass and other important body tissues. Losing weight too quickly can also slow down your metabolism, making it harder to maintain weight loss in the long term.
A safe and healthy rate of weight loss is usually considered to be 0.5 to 1 kilogram (1 to 2 pounds) per week. This rate allows for a gradual reduction in body fat while preserving muscle mass and other important body tissues.
If you're trying to lose weight, it's important to work with a healthcare professional or a registered dietitian to develop a safe and effective plan. They can help you create a balanced diet, provide recommendations for physical activity, and monitor your progress to ensure that your weight loss is safe and healthy.