The site has been free for a couple of years now, i think. But when you click on that centre and you try to learn more about the fasting zones, hey, that's when you get kicked into the upgrade cycle. And it's only fifty dollars a year, or something for b month, five bucks a month. So with zero plus, you get all thatkow. Soyou get a you understand a lot of what's happening inside your body when you're going through different phases of fasting. Your sixteen hour fast creates very different by all mechanics from maybe a three day fast....