Scientific and Medical Education Committee

Dr. David K. Hill

Founding Executive

Dr. Hill oversees all science, research, medical, and safety departments at doTERRA. He is known across the world as an expert in essential oils and integrative medicine.

Dr. Hill, a pioneer and leader, has been a pivotal force for bringing essential oils into the mainstream over the past several decades. He partners with international physicians, scientists, and hospitals, defining and establishing the medical integration and use of essential oils in modern health practices. He guides advances in essential oil science at top universities and research affiliations, helping provide more in-depth understanding of essential oils and their uses.

Along with his many accomplishments in essential oil science and research, Dr. Hill is also a beloved educator. At the end of the day, his favorite way to spend his time is at home with his wife, children, and grandchildren.

Dr. Russell Osguthorpe, MD

CMO, (Chief Medical Officer)

Dr. Russell Osguthorpe currently serves as chief medical officer at doTERRA. He’s establishing a network of primary care clinics focused on wellness and prevention through integrative, evidence-based medical practices. He’s also researching the use of essential oils in healthcare settings.

Dr. Osguthorpe received his medical degree from the McGill University School of Medicine, completed his residency at the Children’s Hospital in Denver, Colorado, and pediatric infectious diseases fellowship at Washington University School of Medicine.

Dr. Brannick Riggs, MD

Vice President of Education, Chairman of Scientific and Medical Education Committee

Dr. Brannick Riggs was born in Lafayette, Indiana, but he was raised around the world. He’s a board-certified family practitioner. In 2001, he graduated from the University of Arizona College of Medicine in Tucson, receiving some of his training in complementary and alternative medicine. After graduation, he participated in the McKay-Dee Family Practice Residency program, which brought him and his family to Ogden, Utah.

Dr. Riggs enjoys the full spectrum of family medicine and is a member of the American Academy of Family Physicians. Dr. Riggs served as medical director of his busy practice, as well as for a nursing home and two hospice groups. He was also the northern Utah medical director for Revere Health from 2014 to 2017.

Dr. Riggs has a strong interest in value-based healthcare and is passionate about changing the profession he loves for the betterment of patients and physicians. He was honored to receive the Patients’ Choice Award for seven consecutive years. He’s now chairman of the Scientific and Medical Education Committee and vice president of clinical initiatives for doTERRA.

Dr. Riggs enjoys using essential oils in his home and integrating them into his medical practice to bless the lives of patients. When he’s not working, Dr. Riggs and his wife, Juli, enjoy spending time with their five children out in the Wasatch Front. They garden, tend to their small farm, and love to travel the world together.

Dr. Katherine Igah-Phillips MD, MHA

Integrative Medicine

Dr. Katherine Igah-Phillips—affectionately known as Dr. K—is an award-winning international speaker and holistic humanitarian. She focuses on the power of mental, physical, emotional, and spiritual wellness.

Dr. K uses her private integrative medicine practice to provide her community with holistic, natural, and authentic medicine, delivered by a team of like-minded practitioners. She also offers a virtual mentorship program, where she creates space for personal development and elevation of consciousness. Dr. K maximizes her life’s purpose by providing necessary tools and coaching for people to access genuine wellness, holistic elevation, and a fulfilling reality.

Dr. Jessica Herzog MD, FAAP, ABOIM

General Practice

Dr. Jessica Herzog is a leader and teacher in the field of natural healing. She serves on the medical boards of Synergy Science and Infinity Medica. She’s the founder of Blue Pebble Health, an integrative and functional medicine center with locations in Utah and Pennsylvania. Her mission has always been to help others advance on their wellness journeys by uncovering what’s holding their health back. Her team of natural-minded practitioners specialize in recovery from chronic fatigue, autoimmune conditions, digestive concerns, and hormone imbalances. Dr. Herzog’s health philosophy is simple: optimize mitochondrial or cellular energy and provide foundational nutrients. This approach has worked for optimization, recovery, and prevention.

Dr. Herzog is dual board-certified and completed her undergraduate degree, medical doctorate, and pediatric residency at the University of Maryland. During her studies, she participated in research teams at the National Institutes of Health and the University of Maryland. She started her career as a pediatric hospitalist, serving in Maryland, Utah, and Pennsylvania. For the last 10 years, Dr. Herzog has exclusively worked in natural medicine, acknowledging the power of time-honored herbal and essential oil traditions. She’s also a champion of cutting-edge health technologies, which stimulate cellular energy and pair perfectly with traditional approaches.

Dr. Herzog whole-heartedly practices what she teaches, striving for the optimal balance of physical, mental, emotional, and spiritual wellness. She uses essential oils daily as part of her personal routine, taking them internally (her go-to method), diffusing, and applying topically. She lives in Utah with her family of six children.