I haven't watched the video, but when I was younger I started developing an intolerance. I always eat a bowl of cereal in the morning, and at that time, about an hour later while I was driving in to work I started getting gut-wrenching cramps every day. Stopped eating the cereal and it immediately went away. That was all fine & dandy, but after several years of not eating breakfast at all I decided to hell with it and started working on it again on the weekends. However I'm guessing something else must have also changed because it didn't really take that long to get back to eating it regularly again, and I haven't stopped since.

I may or may not be trying a lower intensity version of the same video and I'm already noticing results ~1 week in

or the more adventurous route

indeed