The research paper notes that the main energy cost would come from sustaining the bubbles for several days or weeks after they are first created. (carbonbrief.org)
Cats that stop eating, whether suddenly or gradually, over the course of several days or weeks, should see a veterinarian. (kittycatter.com)
You don't have to lower your carbs all at once if its easier for you to slowly lower the level over several days or weeks. (marksdailyapple.com)