At Advance Health Integrative and Functional Medicine, we go beyond masking symtoms by using a systems biology approach to uncover the root causes of disease.
Utilizing cutting-edge diagnostics and the latest insights in functional medicine, we help patients understand not just what is happening in their body—but why.

Dr. Rashel specializes in complex, chronic, and unexplained health conditions. Her approach is evidence-based, personalized, and designed to restore balance, optimize function, and prevent future disease.

Beyond Symptoms, We Address The Actual Root Causes Of Disease

At Advance Health, we look beyond surface-level symptoms. While conventional medicine often manages illness downstream, functional medicine investigates upstream imbalances—the real reasons your body isn’t functioning optimally.

We combine:

Advanced diagnostic testing
Regenerative and integrative therapies
Evidence-based and preventive medicine
Decades of clinical experience

This integrative strategy allows us to identify and correct underlying dysfunctions before they lead to more serious health issues.

Discover how our advanced biomarker testing combined with clinical expertise and cutting edge treatments can uncover hidden causes of inflammation, hormonal imbalance, and metabolic dysfunction.

Integrative, Holistic and Patient Centered

Your symptoms are messages from your body—not random occurrences. Fatigue, bloating, digestive issues, brain fog, anxiety, depression, and unexplained weight gain often signal deeper imbalances that can be corrected with a comprehensive, root-cause approach.

Through the functional medicine process, we investigate all potential contributing factors—including nutrition, hormones, gut health, environmental toxins, stress, and genetics—to develop a personalized care plan that promotes healing from the inside out.

A leader In Functional and Integrative Medicine In Los Angeles

One of the few certified Functional Medicine physicians recognized by The Institute for Functional Medicine (IFM) and is a board-certified Family Medicine physician with over 25 years of clinical experience.

Having overcome her own health challenges through the principles of functional and integrative medicine, Dr. Rashel brings evidence based medical expertise and deep empathy to her patients’ journeys toward wellness.

With the best of conventional, integrative, and regenerative medicine to help patients achieve optimal health and longevity.

Learn more about Dr. Rashel’s approach

The Advance Health Integrative and Functional Medicine Difference

Personalized, data-driven treatment plans
Root-cause diagnostics and prevention strategies
Expertise in complex and chronic conditions
Whole-person approach—mind, body, and environment
Compassionate, patient-centered care

Start your journey toward healing with Dr. Rashel trusted Functional and Integrative Medicine expert.

Schedule a consultation today →

Conditions Treated

Get Answers and Start Feeling Better Today! You can work with Dr Rashel in 5 different ways right away:

01.

Schedule a Functional Medicine Consultation

Schedule Functional Medicine Consultations with Dr. Rashel available in Colorado and California.

02.

Schedule a Functional Wellness Consultation

Schedule your Functional Wellness Consultation from anywhere today! Available in Colorado and California.

03.

Begin Health Restore Detox Program

Start your 6 Day Health Restore Detox Program

04.

Begin Health Restore Candida Clear Program

Begin to Heal Your Gut and Tackle Candida with Candida Clear Programs

05.

Feel Better Now Health Restore Supplements and Kits

Improve your health now with Dr Rashel’s Health Restore Kits

AFFILIATIONS & ASSOCIATIONS

Latest Testimonials

***** ” Dr. Rashel Tahzib is most knowledgeable doctor who pays attention and cares. That is the most I can expect from a doctor. She helped me with my autoimmune disease that I was suffering for many years and helped my wife with her hormone deficiency . We are so grateful to her.”-Vicky S.M

“Dr. Rashel Tahzib is the most knowledgeable doctor who pays attention and cares. That is the most I can expect from a doctor. She helped me with my autoimmune disease that I was suffering from for many years and helped my wife with her hormone deficiency. We are so grateful to her.”

Vicky S.M.

"Dr Rashel is so wonderful. Best Doctor if you have thyroid or hormone problems. My Wife and I both work with Dr Rashel and she is so caring and spends so much time attention we feel like family."

Robert

Los Angeles

"Dr Rashel helped me and my wife with fertility and helped us have our healthy beautiful baby girl. My wife had seen many doctors and done cycle after cycle of failed IVF."

Chris

Los Angeles

"Thank you Dr Rashel for everything you have done for me I can never than you enough. I found Dr Rashel after having gone to more than a dozen doctors and finding myself more and more disappointed ..."

Jila

Los Angeles

About Dr. Rashel

Solving Problems That Are
Beyond Your Control

Dr. Rashel Tahzib is a Functional Medicine specialist, one of the few physicians who are certified to practice Functional Medicine by The Institute for Functional Medicine certified physician list. She is a board-certified Family Medicine Physician with over 20 years of medical clinical experience.

AFFILIATIONS & ASSOCIATIONS

Get Started
Become a Patient

We want you to feel confident in the unique care we provide and ensure it’s the right fit for your health needs.

To get started, please complete the form below with your contact information and answer a few quick questions to determine if we are a good fit for you and your conditions.

Take you Free Online Health Assessment Now

Take Your Free Online Health Assessment today and you will have taken the best first step you can to addressing your health problems and getting rid of your symptoms for good. Dr Rashel Tahzib will review your results and we will contact you to discuss next steps.

Dr. Rashel offers a mobile and virtual practice operating in the Greater Los Angeles and Denver area. This allows greater access and flexibility to patients while maintaining the high level of personalized medicine that works with you.