[ moderator edit: posts moved from "Biggest Loser" Contestants Regained Weight. Peat Perspective ] IMO fat (or rather, lack of fat) is the key to weight loss. There is no better way to lose weight than very low fat (VLF). And VLF is doable on Peat. Fruit, skim milk, lean meats, and cooked greens have almost no fat. I'm trying it out right now. VLF is also the greatest thing ever for correcting liver health. It's a fabulous antidote to a fatty, clogged, underperforming liver. Anecdotally and speaking from experience, I believe poor liver function is what trips up a lot of people who are trying to go Peat but don't feel good on it, or gain weight. Intermittent fasting is also a good weight loss strategy, and is also doable on Peat. Past week or so I've fasted a couple days for about 24 hours on watermelon, with a few glasses of juice thrown in (although I watch that because of the calorie count). Easy peasy. I believe fasting conveys other benefits in addition to calorie restriction, too. But calories also matter. You must undereat a bit to lose weight, and there's no way to get around that. And I'm not sure it's possible to undereat without tanking your metabolism to a certain degree. However, I strongly believe if undereating is done sanely, and with an eye towards losing as little metabolic energy as possible, and also with an eye towards compensating for potential nutrient deficiencies, it's doable. IMO and IME, as a former heavy hitter (just coming off losing 85lbs and still a bit more to go), a moderate metabolic loss is a reasonable trade-off to go into the weight-losing calorie deficit. You can gain the metabolism back as long as you've managed the loss correctly while undergoing it. As with most things that become skewed beyond the normal, to get to the ideal requires compromise. My compromise with losing body fat is losing some metabolic energy due to calorie deficit in exchange for losing the lard. IME it's also important on any weight loss journey to take breaks from the metabolic loss, as well. For every three weeks or whatever of overall calorie deficit, take a week off and eat normally. Around here, that means pure Peat. It keeps off the jones and also tells your body you're not actually starving to death. It makes you realize your weight loss is a finite intervention, not something that's going to go on interminably or forever. Understanding this can be a great psychological boost when trying to lose a lot of weight. So I guess maybe it's not possible to do "pure Peat" and lose weight...at least if you've got more than 20lbs or so to lose, or if your liver is messed up. I certainly didn't lose any weight on "pure Peat" and might have gained some, although I was not checking the scale during my first dalliance with it. But judging by the way my clothes fit during that 6 months or so, there was no loss at all. Worth noting is that my liver was screwed when I tried Peat the first time. But IMO tweaking Peat to be VLF is very doable and is a probably a decent weight loss strategy. I'm currently trying it out and will update when I know more based on experience. Also IMO, the problem with the Biggest Loser contestants and the people featured on "My 600lb Life" and shows like that is that they are put on these horrible regimens with no eye towards correcting already raging nutritional deficiencies or keeping metabolism revved up or digestion functioning properly. They're just forced to lose weight by extreme calorie deficit while also losing nutrients and hormone functioning. They're killing and clogging their mitochondria at the same time with FFA. Horrible, horrible, horrible. Just my $0.02.