They offer a service that includes their supervision... The diet itself isn't proprietary, and given their results I don't mind they charge a decent amount. But

They offer a service that includes their supervision... The diet itself isn't proprietary, and given their results I don't mind they charge a decent amount. But, again, the diet is basically: get almost all of your calories from animal fat (four-legged animals, because of the particular fatty acid profile), eat enough protein but not in excess, and eat organ meats (liver, brain, etc.) once a week. I don't know how you make your judgments but if you look at any intervention by Zsófia Clemens she will strike you as an obviously decent person, these people are not charlatans. Also, this animal-based ketogenic approach is not unique to them, the "zerocarb" / "carnivore" community is also full of testimonials of people reversing various conditions, especially autoimmune disease. This high-fat approach tends to attract people who are in more difficult / urgent situations, such as late-stage, inoperable cancers.