Up until I started getting kidney stones, I was a big fan of the Atkins diet, which remains the only diet I've ever been able to stick with longer than a few weeks. There's just something about never being hungry that I really liked......~sigh~.........
Anyway, I'd go on this diet and unfailingly drop 10 pounds or even more in the first week, and as much as 25 pounds in the first month. I also had to pee like the proverbial racehorse during the early weeks, resulting in the disappearance of the edema my body likes to carry around for some reason. In fact, just last week I started a new effort to curb my carb consumption---in the fall and winter, I tend to crave carbs like crazy, and since I'm less active in the cooler months, I figured I'd better get things under control so I don't gain weight this year.
I lost around 40 pounds last winter, and I REALLY don't want to regain them......I'm still dangerously overweight as it is, and I've been eating like a horse all summer because I've been so physically active. (I wish I'd figured out how to do this 150 pounds ago......now I stay in the same 5-pound area with little effort.) So I started restricting my carbs to around 100 g/day or less, and voila!---my edema is totally gone. And yes, I've been spending a lot of time in the bathroom.
Water weight? Yeah, probably.........but as someone already stated, weight loss is weight loss, and I'll take it!