“The classic signs and symptoms for vitamin D deficiency are often aches and pains in your bones and muscles and often physicians misdiagnose this.” — Boston University Vitamin D pioneer Dr. Michael Holick, talking about his book, “The Vitamin D Solution.”

Holick has promoted sensible sun exposure as the preferred source of vitamin D for decades — a conclusion backed by overwhelming research that outdoor workers have significantly higher vitamin D levels as compared with indoor workers and that vitamin D is scant in diet. Further, Holick has shown that millions of people have conditions that prevent intestinal absorption of vitamins, making it impossible to get vitamin D through diet.

To see a video of Holick discussing his book, click here.