<s>[INST] Is it normal to lose 5 lbs in 3 days? [/INST] Losing weight too fast or too rapidly is hazardous and sometimes it is not possible. The scientific way of losing weight is by restricting diet, improving physical activity, adding some treatment like medications. Generally this kind of weight is lost in very huge patients where excess weightloss is very high only after Bariatric Surgery. The treatment has to be based on a person's BMI, total excess weight, lifestyle, genetics and an ideal obesity centre should design the weightloss treatment for the patient. Source: LOC. Link: https://obesityasia.com/faqs/. Field: Endocrinology. Disease: Obesity </s>