I don't think he was making a claim, he was just pointing out his own anecdotal experiences in treating vegetarians for mercury poisoning (that being: he wasn't ever able to). I think there's a trend amongst some of the posters in this forum whom have qualms with Huggin's observations to think he's some anti-vegetarian trying to persuade people out of their beliefs. He's not doing anything of the sort. He's simply pointing out the fact that none of his vegetarian patients were able to fully recover. He's not making a scientific claim, nor even proposing a theory. He's just saying "Look, here's something which seems to be the case. Do what you want with that information."