If you read those studies, part of the reason these diets are hard to study to see how they effect the body in the long term, is because the average person does not stay on them, they are not able to. It is not sustainable for the average person. I know people that do XYZ, great, the average person is not staying on keto for life. The average person is overweight and does these type of diets for 5months to a year, loses the weight, and then goes back to eating the way they were before. In part, because they get sick of depriving themselves, hate what they're eating overtime, sick of seeing everyone else eat xyz, and so on. Again, it's not sustainable for the average person. But if your staying on this for life, good for you breh. Your better than most, that do this shyt for the short term, than are fatter then when they started a year later.