If you expect sunshine to provide you with vitamin D, then make sure your shadow is shorter than your height. The long shadow we see in November is proof the sun is not doing it for us any more, and it's time to take care of ourselves.

Reinhold Vieth, PhD#

Professor Departments of Nutritional Sciences, Laboratory Medicine, and Pathobiology, Bone and Mineral Laboratory, Pathology and Laboratory Medicine,
University of Toronto, Toronto, Canada