Dr Rashel-Advance Health Integrative And Functional Medicine

Concierge Functional Medicine Because You Are Important

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Gut Health

Begin Here for personalized integrative and functional medicine gut healing approach and treatments
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Thyroid Health

Begin Here for integrative functional medicine approach to Thyroid Health, Hypothyroidism and Hashimoto's
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Hormone Balance

Begin Here For Hormone Balance, optimization, BioIdentical Hormone Replacement for Men and Women
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*****  ” 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


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Step 2. Receive Free Phone Call To Discuss

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Step 4. Follow Up Result Analysis & Treatment Plan

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Step 5. Follow Up Support & Optimize

Expertise In Functional And Integrative Medicine
Los Angeles And Denver Functional Medicine Doctor

We are here to partner with you on your journey to optimal health and well being. Our passion is your health.  We are here to make it easier for you.  We will shed light on the real issues at the core of your health concerns, and give you evidence based answers and solutions that ultimately result in breakthrough healing and optimal health for years to come.  

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

Her evidence-based scientific approach and knowledge of Functional Medicine, combined with her tremendous personal experience with the health and disease process sets her apart and leads to the evolutionary personalized medicine she offers that works remarkably with her patients. 

Patients at Advance Health Integrative And Functional Medicine enjoy the best of what contemporary medicine has to offer with individualized attention and time that goes beyond visits. 

Dr Rashel Integrates and customizes the most effective and above all safe treatments of conventional, anti-aging and functional medicine with unsurpassed concierge level personalized care and attention.

Dr Rashel has walked in the footsteps of many of her patients with her own health challenges earlier in life that she successfully reversed and it is her purpose to bring you the same healing.  You do not have to settle for anything less than feeling your best because health and wellness are your birth right. 

Your symptoms such as fatigue, bloating, digestive problems, brain fog, weight gain are your body’s way of telling you to pay deeper attention and not settle for being told everything is normal.  Dr Rashel will put the power of your health back in your hands, were it belongs. 

Autoimmune Disease Reversal

Using Functional Medicine, we will identify and peel away the layers of imbalance that triggered autoimmunity to reverse autoimmune disease and restore a state of health and balance to your body 


Bio-Identical Hormone Replacement Therapy

Regain the zest for life and look and feel great in your 40’s, 50’s, and beyond with customized bioidentical hormone replacement therapy.  Bioidentical Hormones have the same molecular structure as natural hormones, they can replace hormones that women and men loose in menopause and andropause with the aging process. 


Women’s Health, Hormone Balance

Today more than ever more and more women suffer from hormone imbalance. Some of the symptoms of hormone ...


Insulin Resistance/Obesity

Abdominal obesity is a an epidemic in and of itself and part of the obesity epidemic effecting about half of the adult popula...


Detoxification/Heavy Metals

Toxins are culprits that are among the root cause of many diseases. In our modern world and especially here in the US, we are bathed ...


Digestive Health Restoration

The digestive system is literally the gateway to health and disease, everything that gets absorbed and excreted moves through ...


Candida and SIBO Elimination

If you have experienced or suffered from gastrointestinal symptoms, especially bloating, constipation, gas, stomach pain ...


Thyroid Health Optimization

Thyroid health and specifically hypothyroidism is one of the most heated areas of debate and controversy in medicine.


Low Testosterone/Men’s Health

Most of us want to feel vital, strong, confident, secure, and want to be healthy, lean, fertile, with strong bones, strong muscles, great ...


Sleep Problems

Sleep is one of the most important if not the most significant both short and long-term factor directly affecting your health and ...


Anxiety, Depression, Difficulty Concentrating

Psychiatric difficulties and concentration problems are exceedingly common in the US today with anxiety disorders being the most ...


Lyme Disease/Chronic Infections

Chronic infections like Lyme, CMV, Herpes, Epstein Barr can be culprits in symptoms like chronic fatigue, and fibromyalgia...


Chronic Fatigue/Fibromyalgia

If you or a loved one is suffering from fatigue and or chronic pain and have seen your conventional doctor, you may have ....


Functional Medical Weight Loss

With obesity being an epidemic in the US today and affecting just under half the adult population, and affects about 20% of us ...


Fertility Optimization

Infertility and trouble conceiving is becoming more and more prevalent in the US, about 6.1 million women in reproductive years have ...


Get Answers and Start Feeling Better! You can work with Dr Rashel in the following ways:

You can start feeling your best, get answers to your health challenges, get on the right path to optimal health and vitality by working with Dr Rashel in 5 different ways right away:


Schedule a Functional Medicine Consultation

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


Schedule a Functional Wellness Consultation

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


Begin Health Restore Detox Program


Begin Health Restore Candida Clear Program

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


Feel Better Now Health Restore Supplements and Kits

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


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.

Latest Testimonials

"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."
A young man in a white shirt, who appears to be a Functional Medicine Doctor in Los Angeles, is staring at the camera.
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."
A Functional Medicine Doctor in Los Angeles, dressed in a suit and tie, is smiling.
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 ..."
A woman is smiling while sitting at a table in Los Angeles.
Los Angeles


"I want to live the best life at the highest capacity ... I am feeling the best I ever have!"


"I honestly feel a lot better ... I have a lot more energy, I sleep better, I am losing weight"


"I am now running 5k, 30lbs lighter, more active, look younger & feeling very fortunate to have found her."


"You name it, I had it. Rashel was there the whole time, finding out what was really wrong with me."

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