"Low levels of vitamin D in the population as a whole suggest that most people need to take a vitamin D supplement. This may be especially true for seniors, as the ability to synthesize vitamin D in the skin declines with age."

"The bottom line is that the human body is complex and subtle, and oversimplifying - as common sense sometimes impels us to do - can be hazardous to your health."

"Whenever I write about mental health and integrative therapies, I am accused of being prejudiced against pharmaceuticals. So let me be clear - integrative medicine is the judicious application of both conventional and evidence-based natural therapies."

"I am a particular fan of integrative exercise - that is, exercise that occurs in the course of doing some productive activity such as gardening, bicycling to work, doing home improvement projects and so on."

"My major allegiance has been to storytelling, not to history."

"When purpose is clear, every obstacle transforms into a stepping stone. A lesson woven into the fabric of human history."

"God cannot alter the past, though historians can."

"Every scar carries the quiet memory of a battle faced and survived. Such is the immutable nature of understanding."