The standard UK NHS leaflet about vitamin D deficiency -

here - http://www.patient.co.uk/health/Vitamin-D-Deficiency.htm

lists publications from 2006.

A summary of history from the 1800s to date here - http://www.ncbi.nlm.nih.gov/pubmed/19185802

I note a reference to rickets, and I was under the impression that UK white flour had at least one additive to reduce incidence of rickets and had done for decades.


It seems open to question therefore whether " this Vitamin D stuff is new. She didn't know anything about it six years ago"