text: Is 10lbs. a number you need to have?  You can safely lose 1-2lbs of body FAT per week by reducing your calories or increasing your activity.  That gets you about 8lbs.  If you need just the number of lbs., I was a wrestler and have been able to drop 5lbs of water weight during a couple of hours.  Of course, you gain it right back when you drink it again.  \n\nGood luck.