What is the WORST weight loss advice you've ever been given?

bluecat145

My friend seems to think fat is what makes you fat, so she tried to cut out every gram of fat she can to lose weight. While I can see where her reason is coming from, I tried to tell her that it wasn't true and she actually needs some fat in her diet. She didn't believe me at first, but after some convincing she decided she'll try a different weight loss plan.
I know my case isn't so extreme, but I'm curious to hear what some of the absolute worse advice you've heard was.