Because it was debunked back in 1997:<p><a href="http:&#x2F;&#x2F;www.neurology.org&#x2F;content&#x2F;48&#x2F;3&#x2F;626.short" rel="nofollow">http:&#x2F;&#x2F;www.neurology.org&#x2F;content&#x2F;48&#x2F;3&#x2F;626.short</a><p>Just another case of HN users clicking on flashy things without stopping to examine the evidence. Some more examples:<p>- deep brain stimulation: hundreds of upvotes here on stories about this, but then when studies come out showing that it it no better than placebo that story gets 3 upvotes on HN.<p>- fecal transplants for C dificile: again hundreds of upvotes for stories touting this, but then when it is found to be no better than placebo the story gets no upvotes on HN.<p>These are just a few examples, but I see this all the time on HN. It makes me a little disappointed in the community and thinking that perhaps I should be hanging out somewhere else instead.