from what i understand, winny is kinda like a diuretic. you get veiny because it draws the water out of your system, and even though the body is 70% water, the easiest water to lose is that in the fatty layer just under the skin and that goes first (logical why this is so, one wouldn't want to dehyrdrate and have major organ shut down first eh?>). anyway, that's why they say you should stack winny with something like DECA or sust, which have a bit of "bloat" associated with them, b.c winny will suck the H20 out of you and also suck the extra water which lubricates your joints out of you sometimes causing joint pain...