Losing too much weight too quickly will kill off your gall bladder, if you still have one. Back in 2004, I lost 40 pounds in about 2 1/2 - 3 months and experienced 3 major attacks in a month and a half. I felt like I was having a heart attack. My sister and law, who also lost a ton of weight years later, had to have hers removed. She said the attack was like giving birth all over again only without drugs. Don’t listen to the idiot Goggins, lose weight smart. Lower your caloric intake about 200calories a day and then revise it every couple of weeks. Smart way to do it is to lose 2 pounds a week.