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!

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.

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!!!

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. 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.