While a low-carb diet is useful for a lot of people, the actual ketogenic diet, which is also pretty low protein and very high fat, is difficult to stick with. Your body eventually adapts to running on fats, but taking in any carbohydrates resets the system, and you have to go through the adaptation process all over again, which is not pleasant, and often referred to as keto flu. The ketogenic diet would be a good fit for anyone who’s willing to put a lot of time into tracking and planning, to make sure they have the right balance of fats, as well as someone willing to give up carbohydrates indefinitely. It would also work well for someone who’s not very physically active. For anyone else, the diet will be extremely difficult to follow for any significant length of time.