Tammy Slaton has lost a stunning 500 pounds since the premiere of 1000-lb Sisters, but now the TV star’s diet is under scrutiny. When Tammy made her television debut, she weighed over 600 pounds and continued to gain weight, coming in at 720 pounds by season 3. Her weight was a vicious cycle. Being as big as she was made it hard to exercise, which kept her from losing weight, but she also wasn’t willing to make other changes in her life. It got to the point where many people gave up on Tammy, including her own family.