According to the top-voted answer of this question:

When we sleep in this position, iron from the whole body starts to congregate in our brain which can cause headache, Alzheimer’s Disease, Cognitive Decline, Parkinson disease and brain degeneration.

Wow, it seems a bit surreal, especially when this other question say that it doesn't have any risk.

Did research after 2011 arose new problem? Or is it that Hindu guy horribly wrong?

  • 1
    While the post on Hinduism isn't really enough to satisfy our notability requirements, there seem to be many other versions of this claim floating around the internet. I didn't find any that include Alzheimer's and the other mentioned diseases, but most include at least the magnetic field explanation for the rule.
    – Mad Scientist
    Aug 21 '14 at 13:28
  • 2
    For a start, that answer implies that the human body is essentially a sack of water with no barrier where metal ions are free to flow, which is plain false. Otherwise The paper cited in the other answer is still a valid answer to this question. The right thing to do would be to ask the answerer on the Hinduism site to cite the "science" that says that. Just adding "science says" in front of something doesn't make it true.
    – nico
    Aug 21 '14 at 13:37
  • 3
    Iron isn't naturally attracted to North -- only magnetized iron is. Aug 21 '14 at 13:43
  • 2
    @nico Scientific issues are usually off-topic on the religion sites. That avoids the whole issue pretty effectively. They don't have the experts to judge a scientific answer, but they can judge the religious reasons and doctrines behind it.
    – Mad Scientist
    Aug 21 '14 at 13:44
  • 3
    @DrakaSAN We don't open new questions on the off chance that there's been "new research". If you want to get new answers to the old question, you should put a Bounty on it. (Personally I would suggest not worrying about this, though, it's clearly a myth.) Aug 21 '14 at 13:49

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