First of all, the author sells a book about vitamins being bad, so he's probably not being objective about it. Ok, but that standard applies to any researcher

First of all, the author sells a book about vitamins being bad, so he's probably not being objective about it. Ok, but that standard applies to any researcher who receives grant money or a salary. In fact, it's so high a standard that objectivity can be claimed by no one. Which is probably accurate, but not very useful for making distinctions—it's a case of what Hegel called "the night in which all cows are black".