I'd really like to understand better what is happening inside your body when you lose weight. There's so many things that could account for a perceived lack of weight loss like retaining water, building muscle, constipation and so on. Just stepping on the scales tells you almost nothing about what is going on. I hear a lot of theories, like fat cells filling with water then emptying, or eating carbs you carry around a larger store of water, but I never have really heard of anyone studying this or publishing the mechanics of it.