I haven't done any research as far as tested data, but from my personal logging, High androgenic with heavy starches and processed foods make for high water retention. Ex-potatoes and bread.... I stick mainly to rice and grains for a complex carb and high fiber, but due to the low calorie count of simple carbs I eat a shit load. Fiber helps eleviate some of that water also. I like the water low so I can gage my muscle to fat ratio better... although if dehydrated your fooling your self because the fat cells are just shrunk not metabolized... I guess for me the goal is to stay well hydrated yet keep large amounts of water out of my intestine and larger muscle groups.