This is just my totally uninformed and unscientific opinion - I think the soy, corn and other fillers in supplements are good to avoid (you can usually buy "clean" supplements at health food-type stores), but I suspect the most likley reason the you are not seeing the dramatic changes others have is that your diet was already relatively clean. If your body was already adapted to low carb you might have already been fat-adapted, so you would have gotten the carb flu nor the lower energy from converting to fat burning that some people experience.
I was not fat adapted and had been following conventional wisdom regarding carbs (300 - 400 grams a day) when I converted. I didn't experience much noticeable carb withdrawal, but my energy was low for a week or so and I didn't lose any weight for 3 weeks. I did lose inches though.
| current weight: 528.0