Comment by geoffc

My personal experience jibes with this. For many years I struggled to stay around 200lbs on a low fat diet. A year ago I tried the whole 30 and since then have easily stayed on a no grains or sugar diet and my weight is rock steady at 175 with no effort. I have always exercised a lot (15-25 miles a week running plus other activities) so no changes there and my blood work (cholesterol etc.) are good on both diets. Wish I had discovered this 20 years ago but happy I figured it out.