Vitamin D

Totally different subject matter today.  Have just finished reading - and commenting upon - an article about Vitamin D deficiency.  It seems that almost everyone is sufferng from this (new found) deficiency. I am beginning to think it is a ruse devised by pharmaceutical companies. Have you seen the array of Vitamin D supplements in the pharmacies lately? Vitamin D combined with  Calcium in many of them.  I'm sure it's just aiming at the 'baby boomer' generation who are now evolving into "old people"; old people worried about their health.
I have recently been told that I have a Vitamin D deficiency. Rubbish! I have one acre of garden that I work in nearly every day. Every day, if it is not too cold or wet, I eat my lunch outside...in the sun. I put UV protection on my face only.  My hands and fore-arms are (what my mother would have described) as "brown as a berry".
What I can't understand is how it is that nearly everyone I know has had a result from pathology tests announcing a Vitamin D deficiency.  Either the testing has changed or there is no vitamin D emanating from the sun any more, or the pharmaceutical companies have duped us all.