Dr. Davidson has been in healthcare for over 30 years.  She began her healthcare career as a registered nurse, specializing in pediatric intensive care.  For the last 25 years she has been a practicing physician, first board-certified in Emergency Medicine and now also board-certified in Holistic Medicine. During her 20 years as an emergency medicine physician, she spent 11 years working in, and running, a Level 1 Trauma Center.  By the time she retired from emergency medicine in 2003 she had personally treated over 70,000 patients.  

During her years in emergency medicine she held many teaching appointments including the Center for Disease Control (the CDC) in Atlanta, and adjunct professorships at Wichita State University and Oklahoma State University, as well as spending several years on the board of the American Heart Association.

In 1992, at the age of 41, she was diagnosed with breast cancer.  She was a coauthor and subject of the book Breast Cancer? Let Me Check My Schedule! which was also a PBS special.  She speaks to audiences across the country on various aspects of breast cancer.   

In 1995 Dr. Davidson began looking into the scientific basis of nutritional supplementation and nutraceuticals. With 14 years of experience, she is now convinced  that there are simple and very effective, natural ways to help address many health concerns. She lectures around the world on the subject of nutrition and simple, science-based strategies for maintaining or regaining health.  Her straightforward, humorous and practical approach has made her an audience favorite.