950 S. Tamiami Trail, Suite 210
Sarasota, FL 34236
(941) 529-0077

1539 Parental Home Road, Suite 5
Jacksonville, FL 32216
(904) 290-6028

228 Ponte Vedra Park Drive
Ponte Vedra Beach, FL 32082
(904) 290-6028

Free 30-Minute Session

(941) 529-0077


You’re At The Center Of All We Do

Our passion for client-centered and client-directed care begins with our leadership – ensuring that we treat the whole person, not just the symptoms, while managing your related primary care and supporting your family.

Deb Geihsler

Co-founder and Chief Executive Officer

Deb is a renowned healthcare professional with expertise in preventing and reversing cognitive decline, including conditions such as Alzheimer’s and dementia. She is CEO and Co-founder of Grey Matters Health, the first primary care clinic in the nation that focuses solely on managing cognitive health and preventing cognitive decline by combining Dr. Dale Bredesen’s protocols with a primary care approach. With a master’s degree in Health Administration from St. Joseph’s College, she has held leadership roles at prestigious healthcare organizations such as Harvard Vanguard Medical Associates and Advocate Health Care. She is also the former owner of Hospice On Call and a Principal at Activate Healthcare. Her extensive experience in healthcare makes her an authority in her field, and her clinic’s use of Dr. Bredesen’s protocols for the reversal, treatment and prevention of cognitive decline has garnered widespread praise.

William Nields, M.D.

Chief Medical Officer

William Nields, M.D. graduated from the University of South Florida College of Medicine in 2002, and completed his internship and residency in General Surgery at the Mayo Clinic in Jacksonville, Florida.

Dr. Nields was an associate professor of medicine at Nova Southeastern College of Medicine initially as a Senior Physician in the Florida Department of Corrections Emergency Center, then as Medical Director of the Reception and Medical Center Hospital before moving to the ambulatory primary care setting.

Dr. Nields is the founder of Headwaters Health Primary Care Clinic where the focus is intensive preventative and lifestyle interventions to prevent and reverse chronic disease. In this setting, Dr. Nields has been using Dale Bredesen’s ReCODE protocols for the prevention and reversal of cognitive decline since 2017.

Howard Burde

Howard is a nationally recognized health lawyer who provides general counsel and health law advice to innovative healthcare providers and payers, health care and health information technology businesses. Annually named to Best Lawyers in America, Howard has focused his practice on working with healthcare innovators and entrepreneurs on transactional, joint venture, risk management, privacy, security, regulatory and IP licensing matters as well as capital formation and strategic development issues; counseling health information technology companies, health care businesses, health plans, providers and investors on complex health law regulatory, procurement, reimbursement and business environment; and developing health and wellness programs with employers, employer-based clinics, and occupational health and wellness providers. Founder of the HIMSS HIT Venture Programming, publisher of Health Information Technology Investors Quarterly, a former HIMSS board member and author of several books on health law, Howard was Chief Legal Officer of Activate Healthcare from inception to exit.

Dale Bredesen, M.D., Neurology

Co-founder and Chief Science Officer

Dale Bredesen, M.D. is internationally recognized for his research and expertise in the mechanisms of neurodegenerative diseases such as Alzheimer’s. He graduated from the California Institute of Technology, earned his M.D. from Duke University Medical School, and served his residency at UC San Francisco before joining Nobel Laureate Stanley Prusiner’s Institute for Neurodegenerative Diseases at UCSF as an NIH post-doctoral fellow. He founded the Buck Institute for Research on Aging in 1998 where he serves as President and CEO. He is the New York Times best-seller author of popular books on Alzheimer’s.

Select Publications Supporting Grey Matters Research-Based Approach

Dhana K, Franco OH, Ritz EM, Ford CN, Desai P, Krueger KR, Holland TM, Dhana A, Liu X, Aggarwal NT, Evans DA, Rajan KB. “Healthy lifestyle and life expectancy with and without Alzheimer’s dementia: population-based cohort study.” British Medical Journal. 2022 Apr 13;377:e068390. doi: 10.1136/bmj-2021-068390. PMID: 35418416; PMCID: PMC9006322. (2022)

Bredesen, DE, et. al., Precision Medicine Approach to Alzheimer’s Disease: Successful Proof-of-Concept Trial, Journal of Alzheimer’s disease: JAD 88.4 (2022): 1411-1421)

James, R. et al. “Feasibility of a Functional Medicine Approach to Slowing Clinical Cognitive Decline in Patients over Age 55: A Multiple Case Study Report.” (2019)

Bredesen DE, Sharlin K, Jenkins D, Okuno M, Youngberg W, et al. Reversal of Cognitive Decline: 100 Patients. J Alzheimer’s Dis Parkinsonism 8: 450. DOI: 10.4172/2161-0460.1000450 (2018)

Isaacson RS, Ganzer CA, Hristov H, Hackett K, Caesar E, Cohen R, Kachko R, Meléndez-Cabrero J, Rahman A, ScheyerO, Hwang MJ, Berkowitz C, Hendrix S, Mureb M, SchelkeMW, Mosconi L, Seifan A, Krikorian R. The clinical practice of risk reduction for Alzheimer’s disease: A precision medicine approach. Alzheimers Dement. 2018 Dec;14(12):1663-1673. doi: 10.1016/j.jalz.2018.08.004. Epub 2018 Nov 13. PMID: 30446421; PMCID: PMC6373477. (2018)

Galvin, James E., MD, MPH, “The Prevention of Alzheimer’s Disease – Lessons Learned and Applied” Journal of the American Geriatric Association, 2017 October. (2017)

Additional Bredesen publication links: Bredesen D – Search Results – PubMed (nih.gov)