I final got round to visiting Oliver Gillie's campaigning website "Health Research Forum" yesterday.  It's well worth having a look at.  At first glance I thought he might just be a bit of a cranky campaigner using the internet to have a louder shout about his pet subject.  Not so.  He knows more about vitamin D than the vast majority of doctors and scientists.  His points are well made and extremely well informed.  They build on the increasing concern as new research shows how common vitamin D deficiency is and how widespread the subsequent detrimental effects are on so many aspects of our health (Vieth, Bischoff-Ferrari et al. 2007).  Gillie's freely downloadable information booklets are quite shocking in what they say ... and probably largely correct.  I and my close family have been taking 1,000 i.u. of vitamin D per day as a supplement for a year or two now.  It looks as though we may be underdosing rather than overdosing. 

Health Research Forum (2008). http://www.healthresearchforum.org.uk/aboutus.html  Accessed September 30.

Vieth, R., H. Bischoff-Ferrari, et al. (2007). "The urgent need to recommend an intake of vitamin D that is effective." Am J Clin Nutr 85(3): 649-50. [Free Full Text]