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Are You Ready To Finally Feel Better?

Let’s transform your health with a personalized game plan to address your chronic wellness challenges so you can finally heal and live life to its fullest!

Tired Of Seeing Doctor After Doctor, And Still Not Feeling Better?

Have you been dealing with chronic health issues seemingly forever? Do you feel like you’ve literally “tried everything” and are tired of seeing provider after provider, and yet still not feeling any better?

We see this all the time – people just like you who have been from doctor to doctor… yet not getting the answers they need to understand why they are sick... not to mention a real plan to help them get better!

While conventionally trained doctors are great at acute care, they lack the skills and access to advanced lab testing needed to get to the root of chronic health issues and thus are at a loss to reverse it. So while they are matching expensive prescription meds to symptoms, the real imbalances are left unaddressed.

We want you to know that healing is possible… when you partner with the right provider who’s asking the right questions and can get to the root of what is causing your illness, your symptoms, and what's compromising your body's ability to heal itself.

With our approach, we focus on the unique needs of the client and craft a personalized treatment plan that reflects what we see in your testing and how your lifestyle may be impacting (or even creating) your symptoms. So rather than matching symptoms with a diagnosis, our in-depth evaluation and advanced lab testing will give us a much more complete picture of what triggered your specific physiological imbalances that caused your symptoms in the first place.

That way, we can design a custom-tailored plan to completely support your body... giving it what it needs to finally heal instead of trying to cover up your symptoms with medications.

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Here are several chronic conditions that benefit from this type of approach:

  • Digestive Disorders (GERD, Heartburn, IBS, IBD, SIBO, Crohn’s, Ulcerative Colitis, Swallowing Problems, Gallbladder and Liver Issues, Cancer Screening and More)
  • Autoimmune Conditions (IBD, Rheumatoid Arthritis, Psoriasis, Multiple Sclerosis, Hashimoto’s Disease, Celiac’s, Crohn’s, Type-1 Diabetes)
  • Hormonal Imbalances (Feeling “Tired & Wired”, Hypothyroidism, Hyperthyroidism, PCOS, PMS, Hot Flashes, Painful Periods, Mood Swings)
  • Metabolic Syndrome, Obesity & Dyslipidemia
  • Energy Issues, Stress & Chronic Pain (Chronic Fatigue, Adrenal Issues, Fibromyalgia)
  • Cognitive Issues (SCI/MCI, “Brain Fog”, Memory Issues, Cognition)

Why Partner With A Functional Medicine Practitioner?

Caring for your health properly is so much more than just the basics of eating right and exercise.

With current medical research, we have discovered that the body is a complex collection of organs and systems and even bacterial colonies (the microbiome) that greatly impact each other.

While the standard of care hasn’t quite “caught up” yet with most of the current science, conventional doctors and “specialists” are still treating parts of the body separately without taking into account the fact that these areas greatly impact each other.

When you are healthy, they work together like a symphony in perfect harmony. But when one of these systems is off-balance, the whole symphony is out of tune! When you need a tune-up, not only do you need to look at areas that aren’t working right but also that everything is balanced with the rest of your body.

Sadly, most people receive medications to treat symptoms associated with a body part that “isn’t working” when in reality, it’s a systemic issue that needs to be treated in a completely different way.

In our practice, we follow a more modern “functional medicine” approach. This includes using advanced lab testing so we can get a more complete picture of how your body's systems are functioning together – like your gut health or your hormones.

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We also use up-to-date nutritional science to help you restore your body's healing potential. This in-depth approach is the only successful way of addressing chronic health issues because most chronic illnesses have many causes.

Instead of simply addressing different symptoms across separate areas, functional medicine seeks to resolve the underlying root cause – while looking at lifestyle factors such as diet, environment, emotional health, and mindset that usually brings on the health issue patients are seeking to heal.

Listen To What Our Patients Have To Say


  • A woman with curly hair, wearing a blue top, smiles warmly.

    My mother had brain surgery 4 years ago and ever since then, it's been a battle to find her a specialist who can recommend supplements that can help her heal without prescription drugs. We made a functional medicine appointment for her with Dr. Mark and he immediately knew what to recommend for her. This is the first time in 4 years that my mother did not have a bad reaction to the new supplements she tried and she actually says that she feels better when she takes them. For my family, this is great because it's one step closer to helping her body heal without prescription drugs and this has been a 4-year battle. I just stocked up on supplements for her actually. It's the perfect combination. This place has its own supplement line which is awesome!

    Sweeta B.
    San Ramon, CA
    A patient since 2020-currently
  • A man with short gray hair is smiling and looking slightly.

    Over the years I've visited many medical practices, with varying approaches to getting to the source of the health problem, vs. those that only treat the symptom without addressing the causes (i.e. Hospitals, Kaiser, etc... ) Dr. Jeffrey Mark and Dr. Fran are by far the most knowledgeable, smart, and technologically forward-thinking practicing practitioners in the Bay Area. They use so many state-of-the-art tools. They're constantly going to conferences to learn about all the emerging ways to really help people to be healthy; much more so than most doctors. They really know how to interpret lab values - using cutting-edge, sophisticated lab analytics - to determine all the contributing factors involved- to come up with a very complete and comprehensive way to not only fix my health problems and symptoms but also get to the root of why and all the contributing elements to the problem. I am so pleased and happy with trusting my health with everyone at All Functional Health. Every visit I feel like they truly care about helping me get better.

    Robin O.
    San Francisco, CA
  • A woman with straight brown hair and bangs smiles .

    I'm so incredibly impressed with his Dr. Mark’s attention to detail and efforts to really get to the root cause of what was wrong. He's careful to take time with each patient and really listens to what is going on. Then he carefully decides the action plan, carefully selects the types of tests he needs to run to identify the root of the problem, and utilizes the information to get his patients well from the inside out. You can tell he genuinely cares about his patients and deep down he IS genuinely a good person. So many other GI doctors just want to prescribe their patient's many medications to cover up the problems. Dr. Mark really wants to get you better! And the staff is always friendly and helpful. They go above and beyond for their patients and it makes a world of difference! Thank you!!!

    Kate P.
    San Carlos, CA
    A patient since 2019-currently
  • A bald man with a gray beard and mustache smiles broadly.

    I needed a new gastroenterologist to help manage my ulcerative colitis. I've seen Dr. Mark twice and he is one of the best M.D.s I've ever seen. He has suggested tests Dr. Lane never imagined to better titrate my meds and manage my disease. He is very smart, and upbeat and seems to take a personal interest in making sure my UC doesn't flare up and that the Side Effects of my medications are managed appropriately. Dr. Mark has taken a more holistic approach to my UC and suggested some dietary restrictions. They have worked miraculously and I am now off prednisone for longer than I have been in the past 8 years. I highly recommend him.

    Mike K.
    Walnut Creek, CA
    A patient since 2016-currently

Our Wellness Programs

Frequently Asked Questions

Is This Program Right For Me?

If you’re tired of shuffling from doctor to doctor without ever getting to the root of your chronic health issues, and if you want to optimize your health holistically through sound lifestyle modifications, advanced lab testing and mind-body techniques without unnecessary medications, then our program may just be what you’ve been looking for all along. Just know that it takes a serious commitment to make the lifestyle changes necessary to transform your health once and for all.

What About Supplements & Lab Testing?

As a prospective patient, you may wonder about additional costs not included in our program fee. We know that you’ve likely been to other providers before that may have already run lab tests. That’s why during our comprehensive intake consultation, we will review any existing lab results – so that we can determine if additional, more advanced lab testing is needed to confirm a diagnosis. In terms of supplements, we may recommend certain pharmaceutical-grade supplements for a limited time to support your body’s innate healing process. But long-term, we believe that supplements can’t make up for a poor lifestyle – so our intent is to get you off supplements and unneeded prescription meds as soon as possible.

What Should I Expect From My Discovery Call?

During the free discovery call, we’ll determine whether partnering with our team is the best next step for you. We’ll go over any questions you may have about our approach, and how it differs from what you’ve tried before – so you feel comfortable about the journey ahead.

What Should I Expect From The Initial Appointment?

Ahead of the initial paid appointment, you will complete our extensive background history forms so that we can properly review your history and lab results ahead of your appointment. During the appointment, we will together review your completed intake form, medical history, current and past lab tests – as well as any medications taken, so that we can arrive at a baseline assessment of your overall health and nutritional status. If needed, we may decide on more advanced lab tests to confirm (or rule out) a specific diagnosis, so we can create a personalized treatment protocol.

Our team at The Real Gut Doctor strives to provide you with the most effective and medically advanced techniques available. We are here for you… to help you finally reach your desired health goals.

When we speak, we’ll assess whether this program is right for you… and answer any questions you may have. Simply pick a time and date that works best for you!

Book Your FREE Discovery Call

Take The First Step Today On Your Journey Back To Health

Do you have questions about starting your path back to health? Our patient coordinator is standing by, happy to answer any questions you have to determine if our approach is right for you.


About The Real Gut Doctor

Known for his successful approach towards chronic digestive and wellness issues, Dr. Jeffrey Mark, M.D. and his team at The Real Gut Doctor combine an integrative, functional medicine approach informed by advanced lab testing.

Our unique approach to diagnosing and resolving chronic health issues recognizes that lasting health depends on resolving the underlying root causes of your symptoms. Click here to learn more »

Your Next Steps

After you have reviewed the information on our website and in our downloadable guides, we’d love to hear from you – to answer more specific questions about our approach and track record. Simply apply for a free discovery call with our patient coordinator at (925) 736-9828 or via our online appointment scheduler.

Areas Served

The Real Gut Doctor is based in San Ramon and Turlock, CA, and serves patients internationally as well as throughout the Bay Area and California. These areas include but are not limited to Palo Alto, Menlo Park, Atherton, Los Altos, Woodside, Portola Valley, Los Gatos, Hillsborough, Burlingame, Carmel Valley, San Francisco, Pacific Heights, Presidio, Marina, Danville, Blackhawk, Diablo, Pleasanton, Alamo, Walnut Creek, Lafayette, Orinda, Piedmont, Berkeley, Marin County, Santa Clara County, Napa Valley, Sonoma, Oakdale, Sacramento County, Lake Tahoe/Incline, etc.

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