I am amazed that when I am on a specific protocol to kill this yeast, I lose weight effortlessly, even while still eating potatoes and rice.  Two years ago when I introduced more list 3 foods like nuts and fruit and cut back on grains, my weight crept back up which confused me.  I guess this was the yeast condition returning (hence back to list 2) and the bad bugs causing me to gain? I'm not overweight, I'm talking about 7-8 pounds here, but even that makes a big difference in how my clothes fit and how healthy I feel.  I feel better and slimmer while cleansing the yeast for sure, although I don't think it's sustainable to eat only list 2 foods forever and I hope I won't be on SF forever (ha!). But it makes me almost afraid to proceed through the lists as I don't want that weight to come back on.  Does the body, once healed, really balance out in this regard and these ups and downs and fluctuations become more stable? 
With regard to the gluten discussion, I have never found it easier to keep weight off (lost 10 lbs. immediately) and my blood sugar and hunger seems MUCH more stable since cutting it out four years ago. (Real hunger vs. needing a meal every 3 hours to satisfy crashing blood sugar). I'm sure all that wheat was contributing to the yeast overgrowth.