How bizzare reading this thread, as i was only talking to my eldest son this morn about taking Vitamin D ( he never leaves the house) he agreed to take it and me with brain fog forgot to buy it when i went out! There was a phone in on the radio about a week ago i think it was a gp who said she had tested someone and they were found to be really low on it, she recommended all us Brits ( if you living in Uk) taking vitamin D throughout the winter months