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Functional Medicine Doctor in Irvine, CA
The Functional Medicine Center was founded by Dr. Steve Hyjek to provide comprehensive, personalized healthcare solutions for individuals struggling with chronic health conditions. Our approach focuses on identifying and correcting the root causes of illness through advanced diagnostic testing, functional medicine protocols, and integrative therapies. With expertise in treating autoimmune disorders, thyroid dysfunction, and metabolic conditions, we combine cutting-edge science with natural medicine to restore optimal health.

Our team prioritizes patient-centered care, emphasizing thorough consultations, lifestyle modifications, and evidence-based treatments tailored to each individual's unique needs. By addressing systemic imbalances rather than merely managing symptoms, we help patients achieve lasting improvements in energy, mental clarity, and overall well-being.
Services
Functional Medicine Chiropractic Care Advanced Lab Testing Clinical Nutrition Low-Level Laser Therapy
Highlights and features
  • Specialized expertise in reversing autoimmune conditions and hormonal imbalances
  • Personalized treatment plans based on advanced functional lab testing
  • Combines chiropractic care with functional medicine for whole-body healing
  • Doctor trained in 85+ hours of applied kinesiology and functional medicine
  • Proven success in resolving chronic conditions like Hashimoto's and diabetes
Associations and certifications
  • Institute for Functional Medicine
  • Kalish Method for Functional Medicine
  • Northwestern College of Chiropractic
  • Titleist Performance Institute
What people say
Reduced symptoms Personalized care Thorough diagnostics Chronic pain relief Improved energy
Services
Functional Medicine
Our functional medicine approach identifies and corrects underlying causes of chronic illness through comprehensive testing and personalized treatment plans. We address systemic imbalances in hormones, digestion, and immunity using natural interventions. Patients benefit from targeted protocols that reverse conditions like Hashimoto's thyroiditis and type 2 diabetes through lifestyle modifications and nutritional support.
Chiropractic Care
We offer traditional and low-force chiropractic adjustments to improve spinal alignment and nervous system function. Our care addresses neck/back pain, headaches, and posture-related issues using evidence-based techniques. Treatment plans integrate corrective exercises and ergonomic recommendations for long-term musculoskeletal health and pain relief.
Advanced Lab Testing
Our comprehensive lab analysis identifies hidden health issues through specialized functional medicine testing. We assess gut health, hormone levels, and metabolic markers to create precise treatment strategies. This data-driven approach enables targeted interventions for conditions like adrenal fatigue and autoimmune disorders.
Clinical Nutrition
Personalized nutrition plans address dietary triggers and nutritional deficiencies contributing to chronic disease. We develop customized eating strategies for weight loss, blood sugar control, and digestive health. Patients receive guidance on therapeutic supplements and whole-food approaches to optimize cellular function.
Low-Level Laser Therapy
This non-invasive therapy uses Erchonia lasers to reduce inflammation and promote cellular repair. We employ it for pain management, injury recovery, and metabolic support as part of comprehensive treatment plans. The therapy enhances healing outcomes for musculoskeletal conditions and chronic pain sufferers.
People
Dr. Steve Hyjek
Founder & Functional Medicine Doctor
Doctor of Chiropractic with advanced certifications in functional medicine, applied kinesiology, and clinical nutrition. Specializes in reversing autoimmune conditions and hormonal imbalances through personalized treatment plans combining cutting-edge diagnostics with natural therapies.
Questions
What chronic conditions do you treat?
We specialize in autoimmune disorders (Hashimoto's, rheumatoid arthritis), thyroid dysfunction, diabetes, adrenal fatigue, digestive disorders, and chronic pain conditions through functional medicine approaches.
How does functional medicine differ from conventional care?
Our approach identifies root causes through advanced testing rather than just managing symptoms with medication. We create personalized treatment plans addressing systemic imbalances using natural interventions.
What diagnostic methods do you use?
We employ comprehensive functional lab testing including hormone panels, gut health analysis, and metabolic assessments to create precise treatment strategies targeting underlying health issues.
Do you offer remote consultations?
Yes, we provide virtual consultations for patients outside Orange County using secure video conferencing while maintaining the same personalized care approach.
What supplements do you recommend?
We prescribe professional-grade supplements from trusted brands like Apex Energetics and Designs for Health, tailored to individual needs as part of comprehensive treatment plans.
How long does treatment take?
Treatment duration varies by condition complexity, but many patients see significant improvements within 3-6 months through our structured protocols combining lifestyle changes and targeted interventions.
Reviews (6)
Nikki R.
Apr 18, 2021 Report
I had been struggling for a couple of years with horrible headaches and just overall not feeling well. Then I started getting deep muscle aches that felt like they were going to my bones. I kept gaining weight no matter how hard I worked out or what diet I tried. I felt miserable! I went to numerous doctors and they all told me I was fine. One even told me I simply needed portion control. I purchased a book about how to heal my thyroid naturally and the author mentioned functional medicine. Magically Dr. Steve was close to me.

I made an appointment and was instantly impressed with his knowledge and the fact he actually listened to me and did not dismiss anything I said. After multiple tests Dr. Steve figured out the problem and got me started on a diet and supplements to start the healing process. I will admit sticking to it was not always the easiest, but I am sure glad I did. I have never felt better! I am able to workout again and see progress. I no longer feel the need to nap during the day and rarely have a headache. Please go see Dr. Steve today!
Alexandra Sophia Marsalis
Feb 19, 2021 Report
I have no doubt that Dr. H. is a brilliant chiropractor and super knowledgable Functional Medicine Practitioner. When I first came, he did some serious blood testing, muscle testing and gave me a prescription for a variety of supplements. However, he is not an MD and is not allowed to prescribe Medicine. Had I needed that, I still would need to pay for an additional consult with an MD specialized in Functional Medicine to get any prescription medicine.

When the business name says "Functional Medicine Center", I find it very important to inform your patients what your limitations are, so that they are well informed prior to committing to paying for a consult. Seems just a matter of practical honesty to me. And therefore, I would rather prefer to consult with an MD specialized in Functional Medicine, as to avoid additional costs next time.
S. Matsuura
Jan 24, 2021 Report
I was searching for a chiropractor for a while after moving from NorCal to SoCal. Finally found a one similar to the chiropractor I was seeing in NorCal. Dr. Hyjek definitely knows his stuff and strong enough to execute. Started me off with adjustments and routines to get my spin back in shape. After a month and a half of regular visits I definitely feel more balanced and more flexible.
Parvin Soroushian
Dec 30, 2018 Report
I was very enthusiastically referred to Dr. Hyjek by a friend who was a former patient of his. I started seeing him in Oct. 2017 to treat several chronic health issues. He is extremely thorough & goes out of his way to explain how treating such issues is like peeling the layers of an onion. Well it's taken a lot of work and a lot of patience but he has been there every step of the way to explain & to encourage. I can honestly say I could not be happier with the results. Functional medicine is definitely the way to go & he represents the best of them. Thank you Dr. Steve (& Jen)!
Levi Seekins
Nov 19, 2014 Report
Since my childhood I have struggled with lower back pain, something I have just gotten accustomed too. Recently though, I also was experiencing problems in my upper back. I walked in to Dr. Steve's office with pain throughout my entire back. From the very beginning he was very helpful, knowledgeable and friendly. Dr Steve has the commanding demeanor that gives a quiet confidence but also a welcoming presence that makes you feel safe.

He started by walking me through what was wrong and not only fixing my current pain but starting the road to long term recovery as well. The first month seeing Doctor Steve was amazing, I was experiencing less pain in not only my upper back but also in my lower back for the first time in 15 years! Dr Steve stands out from other Chiropractors that I have been to because of his knowledge, honest approach and results. I am going to continue to work with Dr Steve and work towards a healthier, happier, pain free life.
Maris Cutler
Dec 14, 2013 Report
I was 7 months pregnant when I went to Dr Steve Hyjek for the first time. My sciatic nerve and lower back were causing me such pain and discomfort that it made it difficult to walk. The pain just made me feel miserable. A couple of our friends recommended Dr Hyjek. After getting adjusted I felt so happy! I had totally forgotten how it feels to walk pain free. it's awesome! I was so happy with the results that now my whole family is seeing him regularly.

Our little son was 4 days old when he got his first adjustment. And our girls (7yrs and 3yrs) love going to "Dr Stevie's" office. I would highly recommend him, especially anyone with any aches and pains, or just wanting to maintain a good overall health.