Simply put, any form of restriction diet tends to cause people to eat less. That can be restricted time or restricted options. People who eat less tend to lose

Simply put, any form of restriction diet tends to cause people to eat less. That can be restricted time or restricted options. People who eat less tend to lose weight, and some of that weight comes from fat. People who lower their bodyfat have so many kinds of improved blood markers. To make a point this guy lost 27lbs on twinkies : https://www.cnn.com/2010/HEALTH/11/08/twinkie.diet.professor/index.html https://www.cnn.com/2010/HEALTH/11/08/twinkie.diet.professor... The only free lunch (pun intended) I think I've observed seems to be protein and unprocessed foods are harder to digest and thus cost some digestion calories (increase the out side of the equation). When someone tells you that "people lost weight on Diet X" you need to think "Did they lose more or less than on a standard diet equated for how processed it is (fiber), calories, and protein?". Source: This is all summarized well in the book Fat Loss Forever by Layne Norton and others