Is it just the body first getting rid of water, as per normal diets?
Probably, but then I do carry a lot of water so if I get rid of some, it's not a bad thing. It's not a diet though but just increases the beneficial bifidobacteria in the colon and in doing so, reduces bloating.
I was in hospital a few years back with a pericardial effusion and had to undergo treatment to drain fluid from around my heart and lungs. They had no idea in the hospital what the cause of it was, but they changed my diuretics. Unfortunately the 2 pints of fluid they extracted was thrown away so they couldn't test it. They said it could have been caused by an infection.
When I was due to be discharged, the cardiac consultant came to see me. He patted my belly and from the sound it made, he said it was full of water. One of my heart muscles is weak, (they said this was heart failure) and I was told that my heart was struggling to rid my body of extra fluid. My kidneys have also degenerated. I blame my heart failure and kidney problems on the high dose of statins (80mg Simvastatin) that were prescribed for me over a period of about fifteen years. I was also on a diuretic that built up high sodium levels and depleted my body of potassium.
Patti, I am hoping that I carry on losing weight. Even the small amount I have lost already is making me feel fitter and I have a lot more energy.