There are no silly questions on the alli message boards. We all here (and happy) to help you.
Yes, some of the sodium is rinsed off and that's a good idea. Remember that ALL foods, except fats and oils, contain sodium. That's because it's a very important nutrient, and helps the body with many functions. The problem is that, like fat, most of us eat too much of it.
Sodium does retain water (which can mask a weight loss) and, for some people, it can contribute to high blood pressure.
Try to keep your total daily intake to around 2,300 milligrams. Most processed food, fast food and items like ketchup, mustard and soy sauce are high in sodium.
I hope this helps.
Pat Baird, MA, RD, registered dietitian