Originally posted by: luv2chill
Well it's not a matter of understanding your body. It's a matter of understanding carbohydrate metabolism. The way your body stores carbohydrates for short-term use is in the form of glycogen--formed mainly in the liver and skeletal muscle. Every gram of glycogen in your body holds 3 grams of water. When you stop eating carbohydrates, your glycogen stores become depleted and your body is unable to replenish them. End result is your body loses a lot of "stored up" water.
Water has a few different ways of exiting your body. Plus, if you weren't paying very close attention to your urine output, I'm not surprised you didn't notice your increased water output.
I didn't mean to discourage you, but trying for a 20 pound weight loss in two weeks' time is an unhealthy view of it. Could you gain 20 pounds in two weeks? Doubtful even for the laziest glutton... why on earth would you then expect your body to be able to lost 20 pounds of fat that quickly? Even if it was possible it's not healthy.
"Slow and steady wins the race".
Good luck to you on your third try.
l2c