[Margaret Pilkington]

I have seasonal affective disorder........my energy levels and mood are both low during the dark months. I try to get out into the daylight every day......saying that the last couple of very snowy winters I was much better.......can only assume it was due to the light reflecting property of snow.

I think the value of vitamin D has been much under-estimated. I think if people were checked for their vit D, a lot of people would be found to have low levels.
It is recommended that people try to get out in the sun with bare face and bare arms for 20 minutes per day....this would give you the vit D you needed.