Not that much effort. Is it seriously that hard to sit with hunger and not eat? Did they give their body control over their soul?  No one needs to starve themselves. When I "diet", I literally just cut out the sugarshit that I've been permitting myself and the weight goes away on its own. Most fatties can do the same: cut the heavy sugar products out of your diet and replace them with fruit, or nothing. Get off your ass and move around, don't even need to "exercise", just take a damn walk. Watch the weight go away. It's not fast, but it's so so so easy. It won't make you "thin", but it puts thin in arm's reach. But of course I haven't touched the heart of the problem, which is that these people are addicts and food is their drug. They feel like crap all the time, so they eat to assuage the pain, which makes them feel like crap. Same cycle, different drug.  That's why people don't trust fatties. They've got the same mindset as a junkie, even if their addiction is more tolerated.