Call us at 928.499.3100


Your health and wellness is our top priority. We are a group of highly experienced healthcare professionals dedicated to bringing you the best available natural healthcare solutions to help you achieve your optimum health and wellness.

Dr. Brandon Chastant

Dr. Brandon M. Chastant NMD, FASA

Medical Director/CEO

Dr. Brandon Chastant began his medical career after graduating Magna Cum Laude with a Bachelors of Science in Nursing from Arizona State University. He gained experience in every facet of hospital patient care, specializing in Cardiac ICU, Telemetry, and the Emergency Department. He earned his Masters of Science in Integrative Healthcare between assignments working as a traveling nurse in the ICU in Arizona, Montana, Tennessee, South Carolina, and Hawaii. He graduated with Top Academic Honors from Southwest College of Naturopathic Medicine and has practiced as an Integrated Naturopathic Physician specializing in Men’s Health including Testosterone Therapy, Women’s Health including Bioidentical Hormone Replacement Therapy and Thyroid disorders, as well as effectively treating acute and chronic illnesses with IV Therapies.

Dr. Chastant is board certified completing his Fellowship in Naturopathic Cardiology under the tutelage of Dr Decker Weiss, NMD, FASA; he is the third Naturopathic physician to achieve this designation. He has trained physicians (MD, DO, NMD) around the country in Men’s Health treatments of low testosterone, erectile dysfunction, and prostate issues. Dr. Chastant has participated in numerous medical missions serving poor, remote communities in Honduras, Nepal, Mexico, and Rio de Janeiro, Brazil.

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Dr. Kristin Austin NMD

Dr. Austin has worked in the medical field for over 15 years. She received an undergraduate degree from the University of Utah in Anthropology (Health Emphasis) and a minor in Psychology. She went on to obtain a Doctorate of Naturopathic Medicine from Southwest College of Naturopathic Medicine receiving extensive training in disease pathology, pharmacology, nutritional counseling, botanical medicine, hydrotherapy, homeopathy, and acupuncture. In addition to the core curriculum her interests led to the pursuit of additional education in biotherapeutic drainage, pain management (including prolotherapy and PRP injections), Applied Kinesiology, gemstone therapy, autoimmune conditions, bioidentical hormone replacement, and weight loss therapies.

Dr. Austin uses individualistic approaches to normalize physiology, restoring cellular and mitochondrial health. Not only will Dr. Austin treat your existing conditions, she also works to prevent pain and illness from occurring. She strives to improve your quality of life, achieve your wellness goals, and heal your body to live your best life possible.

Dr. Austin loves the outdoors and in her spare time enjoys spending time with her husband and dogs.

Josh Williams

Josh Williams M.A. 

Clinical Director

Josh Williams completed his schooling as a MEDICAL ASSISTANT at Everest College and has been an integral part of the Grand Canyon Clinics team from 2008-present. Along with his fantastic attitude and genuine care for all of his patients, Josh is our expert phlebotomist and patient Liaison, directing and assuring the highest quality of patient care. Josh loves to spend time with his wife and daughter, is an avid fly fisherman, and is a singer songwriter in his off time that has played in various local bands over the years. He will act as your ambassador and concierge in the journey to a better you.

Arnie Fonseca Jr.

Arnie Fonseca Jr.

Exercise Physiologist, Health Coach

Arnie Fonseca Jr., specializing in wellness and healthy aging. He has helped thousands of individuals over the past 30 years achieve their goals despite daunting challenges in their lives. He has spoken at both National and International Conferences on topics ranging from Strength and Wellness to the treatment of Traumatic Spinal Cord and Brain injuries. He received his Master’s Degree from Arizona State University in 1990. Arnie has developed two successful Neuro-Rehabilitation Clinics; NeuroStrength Physical Therapy & Conditioning and Neuro Institute, which was the only licensed medical facility in the USA offering his unique approach to spinal cord and traumatic brain injury rehabilitation.

He has been involved in the development and implementation of myriad programs including, A Fitness Experience, a unique strength program, released as a DVD to assist our aging population improve the quality of their lives. As part of the aging Baby Boomers Arnie understands the importance of not only maintaining, but improving, quality of life as you age. Arnie describes himself as a Dreamer. His vision is to add value to as many lives as he can reach. He believes we achieve our dreams by serving others. Arnie has been an academic educator and a coach in many sports, ranging from football to triathlons. Arnie believes in setting an example by constantly setting new goals. He recently competed in a Half Iron-Man Triathlon and is training for other Bucket List events which he strongly believes one needs to help inspire you to create an awesome life!Arnie loves public speaking and writing about health and wellness.


Registered Dietician/Nutritionist