About Us

David Marquis, DC, DACBN, Functional Medicine Specialist

Dr. David Marquis is skilled in the functional medicine approach to evaluation and care of complex and chronic health concerns. He has a focused interest in neurodegenerative and neurodevelopmental conditions including autism spectrum, TBI, Parkinsonian tremors, dementia, Alzheimer’s, and CTE, and also has 25+ years of experience supporting patients with common metabolic conditions including endocrine-related disorders of thyroid, diabetes, and sex hormone imbalances.

Dr. Marquis continuously advances his knowledge in Functional Medicine, and Functional Neurology with over 100 hours annually of post doctorate education. He is an accomplished public speaker and writer as well as a recurring guest lecturer.

He and his wife of over 25 years are proud parents of four wonderful children.  He loves to surf, mountain bike, camp, read, spend time with his family, and play the guitar.  He is also actively involved in his community, donating his time to various organizations such as JustServe.org, Boy Scouts of America, Still Frothy Billabong Surf Contest, and as a Seminary instructor for local youth.

Jessica Joslyn, PA

Jessica is a passionate integrative medicine specialist, with a focus in Family Medicine, Hormone Replacement Therapies, Women’s Health, Homeopathy and Wellness Evaluations. Her mission is to not only treat but to also educate and guide each of her patients on their unique healing journey and/or on strategies to maintain optimal whole health and wellness by combining her many years of experience, continued education and passion for scientific research within the allopathic and natural medical arts.

She has been serving patients on the Central Coast of California for over a decade and also offers remote care.  

Graduated Stanford Medical School Primary Care Associate Program/Physician Assistant Program in 2010. Currently sitting on Vocational School of Nursing, Radiology Assisting, Medical Assistant and Phlebotomy as Chief Medical Advisor for twelve years. ILADS training by Dr Steven Harris in Foster City CA; Tick Borne Diseases, Phlebotomist, Instructor as Phlebotomy, IV insertion, Ozone Certification by Dr Frank Shallenberger, Member of CAPA, AAPA, ILADS

Services 

Internal & Integrative Medicine; Wellness Evaluation; Highest Quality Supplements and Homeopathy Products; Bio-Identical Hormone Replacement Therapy; B12 Injection and IV Nutrition Therapy Recommendations; Prescription Medicines as Needed; Ozone Protocols 

Conditions Seen 

Lyme Disease; Chronic Viruses; Long COVID; Post Vaccine Challenges; Diabetes; Thyroid Disfunction; Cardiovascular Disfunction; Autoimmune Disorders; Inflammatory Diseases

Jessica has deep roots in the region, her family has called the San Luis Obispo and Santa Ynez home for over 100 years.  She loves spending time with her daughter and husband; hiking, visiting hot springs, Sunday drives, getting sand on their feet at the beach, and keeping up with their two GSD dogs, three cats and six chickens. 

A man sitting at his desk with an apple laptop.

Daniel Glimpse, DC

Dr. Daniel Glimpse fell in love with San Luis Obispo while attending Cal Poly, and vowed to return to the place that captured his heart.  As luck would have it the opportunity presented itself, and he didn't give it a second thought.  He’s practiced here in SLO since 2012.

Dr. Glimpse completed his undergraduate Bachelors of Science degree in biological sciences with a minor in chemistry while pursuing many interests.  He trained with the collegiate judo team (prolific national champions), volunteered with the International & National Voluntary Service Training Program (INVST), performed internationally with the renowned collegiate singers in the San Jose State Choraliers, and performed undergraduate genetic research as a MARC scholar and recipient of a National Institutes of Health research grant which afforded him the opportunity to present research findings at biomedical research conferences around the country.

His background in research furthered by research experiences gained at Stanford University, Brown University, University of California San Francisco, and San Jose State University have provided a uniquely diverse background from which to draw upon in clinical practice.  He went on to earn his doctorate at Palmer West and graduated Cum Laude.

A believer in life-long learning, Dr. Glimpse commits to continuous honing of clinical skills and knowledge by traveling widely to study new techniques and the most current evidence to ensure the gold standard of care is delivered.

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John LeMay, PhD Psychophysiology, BCIA, LMFT, QEEG Diplomate

Dr. LeMay has over thirty years of experience in Neurophysiology. He is Board Certified in Biofeedback, is a Quantitative EEG Diplomate,  PhD in Psychophysiology with a Masters in Marriage and Family Therapy.

In his leisure time, he enjoys surfing, outdoor sports and activities. He also loves spending time with his lovely wife, family and friends.