Arguing anything other than differences in levels of exercise/activity and calorie intake has a large mountain of evidence to overcome. The effects of those two are very large, the effects of everything else comparatively small per decades of animal and longitudinal human studies. Nonsense about antioxidants in the diet is exactly that: nonsense. The weight of evidence suggests that, if anything, ingested antioxidant…
If there's one thing I wish I could do to improve HN, it would be to detect this sort of middlebrow dismissal algorithmically. Unsophisticated people read an article like this and think: Gosh, I better eat honey for breakfast! People a little more sophisticated think: Hey, this is anecdotal evidence! Yeah, we know that. But is that the most interesting thing one can say about this article? Is it not at least a source…
Of course, it doesn't need to be called "middlebrow dismissal" but there is nothing better for determining if something is or isn't middlebrow dismissal than users.
TBH, the flag link could be more powerful/useful by asking people to explain why they are flagging something. Later on you can release the categorized flagged post dataset for others to train an algorithm against. If someone is willing to spend the time to click on flag, they are demonstrating that they care about post/comment quality and that is itself a good indicator that they'd be willing to spend the time to tell you exactly why they are flagging something.