About Us

Our two dedicated practitioners combine 46 years of clinical experience and are thoroughly trained in the latest technology available in age management medicine, regenerative medicine, functional medicine, allopathic medicine, clinical pharmacology and neutraceuticals, in order to help each patient attain optimal health.

We will formulate a personalized solution for each and every patient, delivered with warmth, compassion, understanding, and respect.

The practice of medicine is an art as well as a science.  Being a healer is our sacred calling. We look forward to working with you to achieve your highest goals.

“Primum non nocere”. First do no harm.


“Primum non nocere”.
First do no harm.


Jeffrey Mark, MD

Jeffrey Mark, MD


Dr. Jeffrey Mark, M.D. is triple Board Certified in Anti-Aging and Regenerative Medicine, Gastroenterology, and Internal Medicine. Dr. Mark received his B.S. in Neurophysiology from Northwestern University, and his M.D. from the University of Illinois College of Medicine. He then returned to Northwestern University to complete his Internal Medicine Residency at Evanston Hospital, a Northwestern University Residency Program, now also affiliated with the University of Chicago. His specialty training in gastroenterology was completed at the Chicago Medical School, and has developed an Anti-Aging Weight Management Program. Dr. Mark expanded his medical education by completing the Board Certification Program at The American Academy of Anti-Aging and Regenerative Medicine, as well as completed his Stem Cell Fellowship in Biocellular Regenerative Therapy, and is trained in Functional Medicine. Dr. Mark also completed the UCLA medical acupuncture program under Dr. Joseph Helms, who taught the same program at Stanford Medical School. Dr. Mark has a thorough understanding of integrative medicine and believes in a holistic approach to disease prevention and treatment, and has been in practice for over 23 years.


Dr. Mark has received many Awards and Distinctions, including:

  • Patient’s Choice Award – 5 + years Honoree [only the Top 1% of U.S. physicians are granted this award]
  • Compassionate Doctor Recognition Award – 5+ years Honoree
  • Compassionate Doctor Certification
Frances Mark, Pharm.D.,D.D.

Frances Mark, Pharm.D.,D.D.

Age Management & Bioenergetics Specialist

Dr. Fran Mark, Pharm.D.,D,D. is a Board Certified Clinical Pharmacist. She received her B.S. in Biochemistry from the University of Nevada Reno, and her Pharm.D. from the University of California at San Francisco /U.C.S.F. She began her career in cancer research, clinical pharmacy specializing in renal transplantation, dermatology, drug information and regulatory affairs. She has spent the past 18 years working in private practice together with Jeffrey Mark, M.D. Dr. Fran thoroughly researches every product that is part of the All Functional Health supplement line. She teaches stress reduction techniques, including the Heart Rate Variability method, as well as other modalities including bioenergetics to achieve optimal health and wellness.

What Others Have to Say:

Dr. Jeffrey Mark suggested that I would benefit from doing his Detox Program in order to address a deficiency he noticed in my blood test. I did the”14-Day Detox”, taking the powder packets and supplementary capsules as directed, followed by another 7 days of the Bio-transform powder product. From the information booklet, I selected sauerkraut and raw cauliflower as my snack foods. No other snacks consumed.

I chose Dinner as my non-powder meal, having 5-6 ounces of Grass Fed Beef, plus vegetables (no starches, sugars, etc, per the instructions). No alcohol or caffeinated beverages. Filtered water only, as directed.I experienced no ill effects at all from the program, but after just a few days,I noticed I had dropped some weight. I started at 188 lbs, and finished at 174 lbs.

The powder drink tastes good to me, and I was very surprised at how comfortable I felt throughout the Detox Program in terms of NOT being hungry. I saw Dr. Mark a day after completion of the program, and was stunned to see my blood pressure had significantly dropped from a long term average around 120/85 to 85/65. That was amazing to me, and not an expected outcome. In 5 months or so, I will have my blood tested again to see if my numbers have improved further ….and check on my blood pressure, of course! Also, I am going to continue having the Bio transform Sugar Free and Stevia Free powder once daily for the long term, as I like it. It’s very economical on a per-meal-substitute basis, it’s a superb product nutritionally, it meets a specific protein/carb requirement that I can count on for one meal as a sort of “anchor” to help me be more mindful and disciplined about my daily “real” food intake. My goal is better weight maintenance and keeping my blood pressure down to my “new” safer level.

Bruce McKendry - 71 y.o. Age Management and Regenerative Medicine Patient

A few years ago I first contacted Dr. Mark for a stomach virus that I couldn’t seem to get well from. Dr. Mark took the time to explain to me that my digestive system was likely compromised from the chemotherapy I had received a few years prior and started me on a 30 day plan to reset the bacteria levels in my stomach which chemotherapy damages. He prescribed a  probiotic and two different powders to drink daily. Not only did this completely cure my stomach problems I felt better than I had in a long time. Dr. Mark explained that when our bacteria levels are correct we are able to better absorb the nutrients from food therefore we are better nourished and feel better overall. I still take the probiotics to this day and have never had any recurrence of stomach problems.  I would like to take a moment to extend my appreciation to Dr. Mark and his office for helping me stay healthy.  

Patti Z. - A cancer survivor patient

For the better part of my life I have suffered from acute anxiety. Recently personal circumstances caused my anxiety to skyrocket. I sought out Dr. Mark for a solution and sure enough he had a supplement that helps with anxiety. I had my doubts that a supplement could help because traditionally anxiety is treated with prescription drugs so I was certain a supplement would not help. I was ASTOUNDED that within 3-4 days my anxiety level had dropped to almost nothing. Today I’m anxiety free and feeling better than ever.

Thank you Dr. Mark and everyone at All Functional Health for providing the excellent products and services that keep us healthy.

A San Ramon Patient

When my son was diagnosed with ADHD in 4th Grade, I took him to 6 different specialists who all just wanted to put my son on prescription drugs. He was unable to focus in school and was always getting in trouble with his teacher. I felt pressured by everyone to put him on medications but knew in my gut that is not what I wanted for him. I wanted a natural solution and that is precisely what I found with Dr. Mark who tested my son, and manage his ADHD with diet and supplements and other natural options. I’m happy to say that my child is now thriving in school and I know I found the best solution for my family. Thank you Dr. Mark.

S.Y. - A Danville patient

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