 You know, many of you know that Dr. Pincus is a nationally recognized authority on natural and alternative health. He's a successful chiropractor. He's worked with top Hollywood celebrities, professional and Olympic athletes, and he continues to be very involved in some of today's top health concerns. And let's kind of start at the top, Dr. Pincus, and talk a little bit about what are some of the warning signs that you may be deficient in vitamin D?