I don’t think he actually thinks it’s always a toxin. My impression from reading his ebooks (twice) is that he thinks it can easily become a toxin much more so than commonly recognized but that the body is good at managing it up to that point. He even admitted recently in a post I quoted earlier in this thread that he could end up being wrong (although he is doubtful). He does say he is trying to prove it isn’t an essential nutrient with his N1 experiment.I have not actually read the ebooks yet, I should though because a big question I have is how he got from "limiting A cures many issues" to "it's always a toxin".