Dr. Holly Castle, ND

Dr. Holly Castle, ND is a naturopathic doctor with almost three decades of experience helping patients bring their body, mind, and spirit back into balance with individualized natural therapies.  Dr. Castle has worked with patients with a wide range of health conditions including: acne, allergies, amenorrhea, anemia, anxiety, autoimmune disease, constipation, detoxification, digestive complaints, fatigue, fertility and preconception care, food sensitivities, gas and bloating, frequent colds and infections, headaches, heartburn, heavy periods, hormone balancing, immune support and optimization, insomnia, irritable bowel syndrome, menopause, PMDD, PMS, PCOS, peri-menopause, sinusitis, and thyroid disease.  

Dr. Castle’s own wellness journey began as the result of having suffered from intractable migraine headaches when she was younger.  She did not respond positively to conventional migraine treatments, so she began searching for alternatives.  The field of natural medicine offered different therapeutic approaches that she found beneficial and she quickly became engaged in the serious study of naturopathic medicine. Eventually, natural therapeutic approaches completely relieved her of migraine headaches.  

Dr. Castle graduated from National College of Naturopathic Medicine in Portland, Oregon in 1997.  She has taken hundreds of hours of continuing education and post-graduate work, focused mainly on classical homeopathy, complex homeopathy, and Biotherapeutic Drainage.  She also lectures and teaches courses in these modalities to other medical professionals.

Dr. Castle provides convenient and personalized healthcare in the comfort of your own home with Zoom appointments.

“The principles of Naturopathic Medicine have guided me for most of my life. I understand the challenges of making lifestyle changes and I guide my patients through the process of creating better health for themselves and their families. My goal is to provide you with high quality, safe, and gentle therapies that facilitate wellness and bring your body, mind, and spirit back into balance.”

“My two daughters and I have been seeing Dr. Castle for many years for her expertise in homeopathy, which was impossible to find in our area. She is also extremely knowledgeable regarding natural health supplements and an absolute delight to work with. Dr. Castle is our first line of defense whether we are looking for a boost in our general wellbeing or struggling with an illness. We are truly grateful to have her as one of our health care providers!”

~ Tracy A.

“I had a wonderful experience working with Dr. Holly Castle. She has a wonderful communication style that is easy to work with and she was able to easily explain what she felt was going on with me, and in a way that was understandable. I felt well taken care of and started to feel relief immediately that same week. I would highly recommend Dr. Castle to anyone. She takes the time and care to understand her patients and treat each one individually.”

~ Elizabeth T.


  • Doctorate of Naturopathic Medicine, National College of Naturopathic Medicine, Portland, Oregon
  • BA, Arizona State University, Tempe, AZ

Specialized Training

  • Classical Homeopathy
  • Biotherapeutic Drainage
Dr. Holly with daughter Caroline

Licensure and Registration

  • State of Colorado, Naturopathic Doctor
  • State of Arizona, Naturopathic Doctor
  • State of Oregon, Naturopathic Doctor

My Approach

We live in a complicated world with huge amounts of daily stress on the body, mind, and spirit. The quality of our sleep, diet, relationships, work and school obligations, recreation, inner life, and hereditary all play a part in our sense of health and wellbeing. Never before have we humans been exposed to so many factors that can negatively impact our health.

Environmental toxins, exogenous hormones, and artificial electromagnetic fields are just three external examples of things that can damage our physiology and lead to chronic illness. Grief, trauma, and prolonged stress are only three examples of some of the protracted struggles we may face that can also affect our physiology and impact our immunity.

The body can adapt for quite some time before it becomes so out of balance it can no longer regulate itself. Both illness and wellness are processes. It takes time to develop illness and it takes time and commitment to reinstate wellness. Naturopathic medicine is well suited to those with conditions of a longstanding, chronic, or puzzling nature, as well as acute conditions.

Dr. Castle has a virtual boutique Naturopathic practice that allows her to focus on highly individualized care. Her role as your wellness collaborator is to provide you with high quality, safe, and gentle therapies, as well as dietary and lifestyle recommendations that help bring your body, mind, and spirit back into balance and facilitate wellness. 

Before doing this, she will make a detailed investigation of your health complaints and may also order specialty lab tests to determine the underlying cause of your condition. She analyzes all the information and provides a customized set of recommendations. She carefully selects products of the highest quality from North America and Europe. Every patient is treated individually, and you will become a participant in your own healing process.

“When I came to Dr. Castle, I had suffered for over 25 years with chronic sinus issues (almost monthly sinus infections) and had been repeatedly prescribed antibiotics and had 3 sinus surgeries (still no relief!). She was able to help get me out of this cycle and regulate my system so that I have not needed antibiotics for over 4 years! So happy I found her!”

~ Michele G.

“Before consulting with Dr. Holly I had been enduring the pain and limitations of my arthritis for many years. I wasn’t even sure if you could help me when I made my first appointment. Today, after following your recommendations for only a few short months, I feel so much better. This the most energetic and comfortable I have felt in years. Thank you for helping me reclaim my health!”

~ Duane C.

“Dr. Castle artfully blends her diagnostic abilities and keen clinical awareness while gracefully providing a safe and comfortable environment for her patients. The generosity of her heat shines in her eyes as she shares the depth of her experience with you. It is a joy to have someone as gifted as Dr. Castle share her expertise.”

~ Christina C.

Make an Appointment

Dr. Castle is also available for educational consultations with clients living in:

Alabama, Arkansas, Delaware, Florida, Georgia, Illinois, Indiana, Iowa, Kentucky, Louisiana, Michigan, Mississippi, Missouri, Nebraska, Nevada, New Jersey, North Carolina, Ohio, Oklahoma, South Carolina, South Dakota, Tennessee, Texas, Virginia, West Virginia, Wyoming, and worldwide.