As this phalogenics diet includes fasting or semi-fasting days, it is quite difficult to sustain for any significant length of time. Tim Ferris' Diet You might have heard from the Tim Diet ("How to Lose 20 lbs. of Fat in 30 Days Without Doing Any Exercise"). According to Tim, it is possible to lose 20 lbs. of body fat in 30 days by optimizing any of three factors: exercise, diet, or drug/supplement regimen. What he is applying in his diet is basically a strict keto bhb 6 days on/1 day off slow plan, following the basic Calorie Shifting rules.