Hello. Generally speaking, it is scientific and normal to lose six to ten pounds a month. 28 days, thin15kg. 1. only lost a small part, that is, fat. Others are water, waste and body fluids. 2. It's easy to rebound. 3. It is very harmful. Although, I went to the gym for 30 days and lost 26 pounds (the whole person has changed and my immunity has decreased). I wish you all the best, health, happiness and happiness. Please adopt it. Thank you.