I'm not an expert on this topic, so take it with a grain of salt. The reason a low carb diet works for many people (not necessarily extreme keto) is that it reduces the volatility of blood sugar levels, and this results in fewer cravings and being less tired over the day. So taking in fewer calories becomes easier. And then I learned about gluconeogenesis. The body can create glucose on its own and perfectly regulates glucose levels in the brain, etc., once it switches to that mode.

In the end, these tips help to get into a different lifestyle and then reinforce the habits to stay there because it feels better.