Thanks for posting this.
It's good to see Michael VanElzakker also talking about how gut dysbiosis can be picked up by the vagus nerve, send signals to the brain, trigger the sickness response in the brain and cause microglia in the brain to become sensitized.
So smaller amounts of stimuli trigger the sickness response. He starts talking about this at 23:25 in the video. He talks about the sickness response causing pain, fatigue, anxiety, etc.