Vitamin D serum levels are very important - especially for those of us in the northern latitudes. It is produced when skin is exposed to sunlight - which we don't get much of up here in the fall / winter months.
To add to the problem here in Canada - our nanny state health care will not test for serum levels (males anyway). We can not even offer to pay for a test. If you don't have rickets - your levels are fine - very scientific!!
I've been part of a levels vs symptoms study since 2009. Part of this study are serum levels testing (every 6 months). Cost is about $60.00.
In order to maintain optimal levels - I take 8000 IU D3 a day.
To investigate the importance of D3, or join the study go to:
www.grassrootshealth.net/
The clincher for me was the graph of incidence of certain diseases vs latitude (exposure to sunlight). Isn't it interesting that aliopathetic medicine never mentions that?
Vitamin D Could Prevent Breast Cancer Tumor Growth
