Medical Advisory Panel


Dr. David Hill D.C.

Founding Executive, Chief Medical Officer / Chairman, Scientific Advisory Committee

For many years Dr. David Hill has utilized the benefits of essential oils in modern health practices, and as a physician he is a well-known expert in essential oils and integrative medicine. Dr. Hill partners with physicians and hospitals around the world defining and establishing the medical integration and use of essential oils in modern health practices. He fosters education and advances in essential oil science through a number of university and research affiliations providing cutting edge science for essential oil users. He is a frequent guest on many radio and television shows and has authored a number of books and other publications. Dr. Hill stands at the head of a new era dedicated to empowering others to take control of their own health.


Dr. Paul Winterton, MD

Paul W. Winterton is a Board Certified Orthopedic Surgeon. He earned his medical degree from Harvard Medical School in 1993 and completed his Orthopedic Surgical Residency at the Mayo Clinic in 1998. Following residency, he completed two fellowships at The Institute For Bone and Joint Disorders in shoulder and knee reconstructive surgery/sports medicine, as well as foot and ankle reconstruction in Phoenix, Arizona.

Currently, Dr. Winterton serves on the Board of Councilors for The American Academy of Orthopedic Surgeons. For a number of years he has advocated the integration and practical use of essential oils in his practice. As a member of the Scientific Advisory Board for doTERRA, he is currently researching the basic science, cell biology, and clinical application of essential oils. He is a strong proponent of the practical use of essential oils and dietary supplements in the home, as well as in the traditional western medical clinical setting, particularly with regard to bone and joint well-being.


Dr. David Steuer, DMD, MS, MMsC

Dr. David Steuer graduated with Honors in Latin Studies and Chemistry from BYU, and Magna Cum Laude from UofL Dental School. He then attended Harvard Medical/Dental School and MIT for his training in Oral Surgery and Endodontics, where he graduated in 3 years with Honors. He also completed a surgical internship in partnership with University of Penn, and Oxford, in Austria, at the KLH hospital in Graz.

He is the founder and Managing Partner of Steuer Management LLC, and Luminescent Capital Partners, LLC. Dr. Steuer served on the Board of Directors of Hemametrics Corporation, a medical research and products company, acquired by Fresenious Medical Care. Currently on The Board of TransQ Analytics, a non-invasive blood analyte determination, and on the Board of the Health Science and Technology of the University of Southern Maine, Medical School. Dr. Steuer is actively involved in researching new ways to incorporate essential oils into his practice.


Dr. James Geiger, MD

Dr. Geiger has been an anesthesiologist since 1986. He graduated from the University of San Francisco and worked in a San Francisco hospital doing cardiac anesthesia for his father who is a retired cardiothoracic surgeon.

Dr. Geiger has also been an aromatherapist since 2004 and it was in the hospital’s recovery rooms where he first noticed nurses using essential oils and aromatherapy to prevent and treat post-operative nausea. The diligent doctor was intrigued and began studying the scientific literature on the subject. He soon recognized that sciences, such as anatomy, physiology and the chemistry applications of aromatherapy, were similar to anesthesia. He was determined to figure out how to integrate aromatherapy safely into his life and the lives of others, including his operating room patients.

Much of Dr. Geiger’s time is spent doing anesthesia, serving on committees and giving lectures and webinars on the safe use of essential oils in hospitals and surgical centers to improve patient care. Currently, he is on staff at several medical centers, orthopedic hospitals and surgical centers, where he has introduced therapy with essential oils into the operating and recovery rooms.


Dr. Joshua Yorgason, MD

Dr. Yorgason, a native of Salt Lake City, Utah, is an ear, nose and throat surgeon. He obtained his medical degree at Columbia University in New York, and did his residency at the University of Utah. He has been involved in research of drug toxicity and hearing restoration in Los Angeles at the prestigious House Ear Institute, and at the University of Utah. He obtained further fellowship training in ear surgery at the University of Minnesota, and now works in Bismarck, North Dakota for Sanford Health as a cochlear implant surgeon and hearing and balance specialist.

While in practice for the past five years, he has been supportive of alternative medicine, and has used essential oils in his practice. He is a clinical faculty for the University of North Dakota.


Dr. Jessica L.M. Herzog, MD, FAAP, ABHIM

Dr. Herzog is a board certified Holistic Integrative Medicine physician and pediatrician who is devoted to true wellness. She currently practices in York, PA and lives with her husband and three children in Baltimore County, Maryland. She completed her undergraduate degree, medical doctorate, and pediatric residency at the University of Maryland. During her studies, she was involved in research at the NIH and the University of Maryland, and although she loved the basic science, she found her true calling at the bedside of sick newborns and children. She has worked as a pediatric hospitalist in Maryland, Utah, and Pennsylvania. Wellness is a lifestyle that she demonstrates and teaches to her family, friends, patients and their families, medical students, residents, and colleagues. She is a daily user of doTERRA essential oils. She believes that essential oils are a modern miracle of medicine that will continue to shape healthcare worldwide.


Dr. Brannick Riggs, MD

Dr. Brannick Riggs has been practicing medicine for 13 years. In 2001, he graduated from the University of Arizona College of Medicine in Tucson while receiving some of his training in complementary and alternative medicine. He specializes in Family medicine and is a member of the American Academy of Family Physicians. He currently practices in Utah and enjoys using the oils in his home and integrating them into his practice to bless the lives of his patients. Dr. Riggs is currently partnering with doTERRA in an effort to provide volunteer service with essential oils and hospice.


Dr. Gregory L. Woodfill, D.O.

Dr. Gregory L. Woodfill is a board certified Obstetrician and Gynecologist. He completed his medical training at Michigan State University College of Osteopathic Medicine in 1997 and completed his residency in Obstetrics and Gynecology there in 2001. Dr. Woodfill was elected chief resident from 2000–2001 and educated medical students as clinical faculty at Michigan State University College of Osteopathic Medicine 1998-2002. Upon completion of residency, he developed the women’s health program at the Virginia College of Osteopathic Medicine and served as Department Chairman of Obstetrics and Gynecology from 2001–2008. He has previously served as Department Chairman of Obstetrics and Gynecology at Wythe County Community Hospital and as Division Chief of Obstetrics and Gynecology at Wilmington Health Associates. He currently lives in Wilmington, NC, where he performs a full scope of practice with emphasis in minimally invasive office procedures, advanced laparoscopy and urogynecology. He also provides clinical education to the residents at SEAHEC where he was honored to be elected Professor of the Year in Obstetrics and Gynecology 2014-2015.

Dr. Woodfill and his wife, Ashley, co-founded East Coast Oils (ECO), where they study the safe and effective use of essential oils and direct research for the advancement of essential oils in professional health-care settings and home use. He provides education for many health-care providers and Wellness Advocates across the US.


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