The point is you can follow the weight recommendations or you can build up very slowly and listen to your body. I always try to put people right who are trying to go for the maximum regardless. This is especially important with children but also with very sick and low weight people but Humble does address this on his sites.
I think full guidelines on this should come with the bottle though.
I think he said you will be clear from pathogens but I took this to mean that it was not the goal to reach this but the quickest way to do it if you could tolerate it. Certainly this could be clearer