&gt; Neurological changes?<p>Yes, see: <a href="http:&#x2F;&#x2F;news.harvard.edu&#x2F;gazette&#x2F;story&#x2F;2011&#x2F;01&#x2F;eight-weeks-to-a-better-brain&#x2F;" rel="nofollow">http:&#x2F;&#x2F;news.harvard.edu&#x2F;gazette&#x2F;story&#x2F;2011&#x2F;01&#x2F;eight-weeks-to...</a>