I have been low carb for three months. I have lost 22 pounds. More importantly,. I am off blood pressure meds. I don't ache everywhere any more,I lost my daily 3 am headaches. I am off asthma meds, I have a box of meds I am getting rid of. Don't need them any more.
Low carb is definitely effective in weight loss. My general view is that low carb breaks down to an easier way to avoid neolithic agents of disease.
I eat around 150 grams of carbs a day.
Check out http://www.archevore.com/get-started/