Vitamin D deficiency

Worth listening to this:

http://www.bbc.co.uk/iplayer/episode...tes_Vitamin_D/

60% of white Caucasians have less than optimal vit d levels...even in the summer. Worse for non-Caucasians.

Lack of vit D, can effect things like certain cancers and diabetes as well as your immune system.

Blood tests that show 75 nano mil or above is said to be good, anything below 25 nml is lacking.