Lyle’s the man, no question. I like the idea of the Fat Fast, but there’s a saying, “Good advice not followed is still bad advice.” Personally, I could not do just flax and protein powder. I do consume flax by the tbsp frequently on my ckd’s, but I eat normal food too, like steak, eggs, salmon, etc. I would say that if you aren’t on some mega-strict deadline, why not do a regular ckd initially and if fat loss slows after a while then maybe switch to Fat Fast for the final phase. You can still lose fat quite rapidly on a regular ckd with less of a calorie restriction, just be strict with your carb-ups. I can’t do over 24 hrs. of carbing w/o regaining the fat lost during my low-carb days, and I also have to watch my amount and quality of carbs like a hawk as well. FWIW, I have seen the absolute best results doing a modified T-Dawg plan-no pre-workout carbs and only the carbs from Grow post-workout, German Body Comp 3x/week, a good thermogenic such as MD6 or whatever you normally use, no cardio whatsoever (amen), and a strict 24 hr. carb-up avoiding fructose and sucrose. I like to take the best ideas of a group of people and work them into my own customized approach, and for that, thank you Lyle McDonald, Brock, Coach P, the late Guru, Dr. Mauro, Chris and TC.