In general terms, I agree. Since B vitamins are mostly water-soluble[1], generally it has been assumed that excess would be excreted, and research that suggests

In general terms, I agree. Since B vitamins are mostly water-soluble[1], generally it has been assumed that excess would be excreted, and research that suggests that some of them are not so harmless is news. 1: https://en.wikipedia.org/wiki/Vitamin#List_of_vitamins https://en.wikipedia.org/wiki/Vitamin#List_of_vitamins