1. Your article is from the Linus Pauling Institute, which, as has been noted upthread, is the biggest pusher of the high-dose vitamin C myth, which has been pr

1. Your article is from the Linus Pauling Institute, which, as has been noted upthread, is the biggest pusher of the high-dose vitamin C myth, which has been pretty much debunked by now. https://en.wikipedia.org/wiki/Linus_Pauling#Medical_research_and_vitamin_C_advocacy https://en.wikipedia.org/wiki/Linus_Pauling#Medical_research... 2. One of the whole arguments against supplements (which is what we're talking about here, not the quantities found in an every-day diet) is that they tend to mega-dose. But not "mega-dose" in some scary, doping type way. The vast majority of bottles of supplements list RDA values of 200%-1000%, as if that's a good thing. 3. The studies that show cancer link do so with double-blind, placebo-controlled studies using normal, grocery-store supplement levels of antioxidants. e.g. http://www.nejm.org/doi/full/10.1056/NEJM199404143301501 http://www.nejm.org/doi/full/10.1056/NEJM199404143301501, http://jama.jamanetwork.com/article.aspx?articleid=1104493 http://jama.jamanetwork.com/article.aspx?articleid=1104493 4. When you look at reviews that are not pushed by the Linus Pauling Institute, you get quotes like > A recent review of the last 20 years of literature on the subject, presented at the American Association for Cancer Research 2015 meeting, found an overall increased risk of cancer among vitamin users. https://www.sciencebasedmedicine.org/vitamins-and-cancer-risk/ https://www.sciencebasedmedicine.org/vitamins-and-cancer-ris...