I don't know what fat fast is but it sounds alot like what I very first started doing. Sausage for breakfast, 3 whole eggs for lunch, chicken breast for lunch#2 and turky burger with lots of cheese and some spinich. It was virtually no carbs, lots of fat and protein. It didn't work and made me severely constipated.....

Now my diet has raw brocoli with my chicken, hamburger patty for breakfast, 3 egg whites 1 whole egg for lucnh and little cheese with turkey burger and spinich or brussel sprouts for dinner. And liberal amounts of flax seed oil with 2 of those meals. Its still not working but Im not constipated anymore. I think I also need more fat and veggies.