It takes several days of no carbs before your body switches fully to fat as a fuel source
Discussion
I'll watch the video. Is there a difference in the fast before 12h and after? Or it's only once you stopped eating carbs that it makes a difference?
Didn't watch the video yet but I will
There is a difference in effect from fasting the longer it goes. I’m not sure about how different a fast is for a fat adapted person vs non. I’m sure you can find a talk specifically on that by either Dr. Cywes, Dr. Eric Westman or Dr nostr:npub1kyk7ac33apd7cx0nun3laevf84zfhr8pt8kj4h8v7cpx9t72d4gqkyea0g